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<ntzrmtthihu777>
anyone familiar with the openrgss gem? attempting to use it with the openrgss player but think I'm doin something wrong.
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<Mattix>
what should you overwrite to be able to do something like my_object[:my_instance_var] = "my value" ?
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<Mattix>
where my_object.class is Foo (it's not a hash)
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<Mattix>
ah, I got it, never mind
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<Vivekananda>
Hey everyone. Is this a good place to ask beginner ruby questions ?
<Mattix>
it is
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<Vivekananda>
very beginner and stupid ones ?
<Vivekananda>
:)
<Mattix>
probably
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<waxjar>
ask away Vivekananda
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<Vivekananda>
so is var = [a , b , c] correct ? if it not known what types are for a b c
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<Mattix>
did you mean var = [:a, :b, :c] ?
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<Mattix>
ok a, b, c = 1, 2, 3; var = [a, b, c] ?
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<Mattix>
err, or **
<waxjar>
Vivekananda: depends on what you want to do, but that'd be valid Ruby code, yes.
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<Mattix>
it's weird it doesn't know the types though
<Vivekananda>
Mattix: no. I just assign something to a variable but I have not predeclared what those elements are , whether objects or string objects or symbol objects
<Vivekananda>
not declared as in literally declared
<Mattix>
you should paste the code, the syntax is valid, the problem is somewhere else
<waxjar>
you don't have to tell Ruby what kind of objects you're going to assign to a variable
<Vivekananda>
ok so another one. I am trying to find all various ways of writing the poetic code so to speak so is x.[](1) valid
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<Vivekananda>
waxjar: but I read that you have to assign variables before using them
<Vivekananda>
I have not assigned so shoudl I get an error ?
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<Mattix>
sure
<waxjar>
yeah
<Mattix>
but not a type error
<Mattix>
"NameError: undefined local variable or method"
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<Mattix>
that's why pry shows ^
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<Vivekananda>
ok nice
<Vivekananda>
so what about the meaning of x.[](1).
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<waxjar>
[] is the method name
<Vivekananda>
I learnt that there are various ways to write x.send(+,y)
<Vivekananda>
ok. I was hoping that the interpreter could give me detailed hints / clues as it does in java
<Vivekananda>
ok next . if I say foo + bar then supposing one is string and other integer what happens ?
<Mattix>
try it xD
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<Vivekananda>
hmm okay yes I should do that
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<Vivekananda>
ok got cannot convert fixnum into string
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<Vivekananda>
I leart that we can write "string" and %Q{string} for a string
<Vivekananda>
but what does %Q{"a" , "b" , "c"} mean ?
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<Spooner>
Vivekananda, The advantage of %Q{} is that it doesn't require you to escape quotes.
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<Spooner>
Vivekananda, That is the same as "\"a\" ,\ "b\" , \"c\""
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<Vivekananda>
yes but I thought that there can only be one string inside that structure
<Vivekananda>
but am wrong
<Spooner>
Vivekananda, It is only one string, but it contains double-quote characters.
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<Vivekananda>
ooo ok hmm
<Vivekananda>
that makes sense
<Spooner>
It is also the same as: '"a" , "b" , "c"'
<Vivekananda>
okay so I have this %q{"I, Robot", "PG-13"}, which of these regexes will capture it.? regexp = /"([^"]+)",\s*"([^"]+)"/ regexp = /"(.*)",\s*"(.*)"/. I thought the second would
<Vivekananda>
I am doing a problem actually
<Spooner>
Regarding your previous question about foo + bar where one is a string and one a number. You _could_ use str + num.to_s, but it is more usual to use "whatever#{num}" since #{} runs to_s for you.
<Vivekananda>
the condition says that You may assume movie titles and ratings never contain double-quote marks. Within a single entry, a variable number of spaces (including 0) may appear between the comma after the title and the opening quote of the rating.
<Vivekananda>
Spooner: I already tried that . It gave me the expected error , cannot convert fixnum
<Vivekananda>
to string
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<Spooner>
You weren't using either #to_s or interpolation (#{}) then.
<Vivekananda>
so for the regex the first one will include the double quotes. no ?
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<Vivekananda>
Spooner: I wasnot trying to . I was just trying to know what happens when I do this
<Vivekananda>
or do that :)
<Vivekananda>
just playing around. I dont actually want to add it at the moment. Very new to ruby
<Spooner>
The reason the second one fails is because the .* will eat everything. You need .*? instead (or the other one that just looks for not quotes).
<Vivekananda>
do you mean that the first one is correct ?
<Spooner>
Actually, no, they both work fine.
<Spooner>
You were misleading me there ;)
<Vivekananda>
there is only one correct answer and I have 4 choices
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<Vivekananda>
I marked it incorrectly but just want to know what the correct one would be
<Spooner>
Well, run the code in irb and see for yourself.
<Vivekananda>
for the next queestion
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<Vivekananda>
irb will not tell me what is matched or not right ?
<Spooner>
irb will tell you fine.
<Vivekananda>
the 4 choices I have are regexp = /"([^"]+)",\s*"([^"]+)"/regexp = /"(.*)",\s*"(.*)"/regexp = /"(.*)", "(.*)"/ regexp = /(.*),\s*(.*)
<Spooner>
0 means it matches from the first character (nil means it doesn't match).
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<yoshie902a>
Hi, I tried [3,4].include?([3,4]), because I need to test if there is at least one match between two arrays. However, my code does not work. any good way to do this?
<Vivekananda>
Spooner: I get zero for all
<Spooner>
yoshie902a, You are asking if either 3 == [3, 4] or 4 == [3, 4] - that is, seeing if any of the members are equal to another array.
<Vivekananda>
what does that mean ?
<Vivekananda>
all match ??
<Spooner>
Vivekananda, Yes, they will all _match_. However they don't all match correctly.
<Spooner>
You need to check $1 and $2 to see if they are what you expect.
<Vivekananda>
how do I write that ?
<Spooner>
For example, the last one will include the quotes in the match.
<Vivekananda>
a =~ regex get $1 or something
<yoshie902a>
figured it out
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<yoshie902a>
array1 & array2 will give me the intersections
<yoshie902a>
thanks!
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<Spooner>
yoshie902a, Yeah, I was going to suggest that.
<yoshie902a>
Spooner: b/c your smart. I found it on google
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<Vivekananda>
Spooner: how do I output $1 and $2?
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<Spooner>
You can just type them into irb/pry after you've done the =~
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<Spooner>
The first two seem most correct, though one matches 1 or more characters between the quotes and the second one matches 0 or more. One seems best really.
* Spooner
wanders off again.
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<Axsuul>
Can anyone recommend me a good way to track which classes have a certain module included?
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<waxjar>
Axsuul, do you really need to know if a module is included or do you just need to know wether or not in responds to a certain method?
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<Axsuul>
waxjar: I need an array of all classes that have this module included, but i suppose i can achieve the same thing if it responds to method, thanks!
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<waxjar>
ah, in that case you can just do #is_a Mixin
<waxjar>
*is_a?
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<tylersmith>
Axsuul: you could use the included hook
<Axsuul>
tylersmith: it's not reliable cause not all classes may have been loaded
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<Axsuul>
(rails)
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<Vivekananda>
ruby I think I will quit for now
<Vivekananda>
:(
<Vivekananda>
learn later I guess
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<waxjar>
Axsuul, a mixin would also be in the ancestors class method, if you're iterating over a list of classes
<pilojo>
When i try to convert a value in an array to a string i get the error ":in `+': can't convert Array into String (TypeError)". When i use the .join function, i get "in `newgame': private method `join' called for "tranquil":String (NoMethodError)"
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<Vivekananda>
anyone here ?
<pilojo>
Vivekananda: doesn't look like it
<Vivekananda>
hmm
<Vivekananda>
so any clues on what the problem wants
<Vivekananda>
I was hoping to ask more question and learn more
<Vivekananda>
like how does inheritance work in ruby ?
<pilojo>
Vivekananda: i'm looking for help myself
<Vivekananda>
pilojo: I am a beginner
<pilojo>
Vivekananda: i started learning on tuesday
<Vivekananda>
just begun :)
<Vivekananda>
oo nice
<Vivekananda>
which class ?
<Vivekananda>
or just by yourself ?
<pilojo>
Vivekananda: by myself
<pilojo>
making an IRC bot
<pilojo>
600 lines in already
<Vivekananda>
hmm nice
<pilojo>
stuck with arrays, though
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<welandC>
What are you stuck on?
<pilojo>
When i try to convert a value in an array to a string i get the error ":in `+': can't convert Array into String (TypeError)". When i use the .join function, i get "in `newgame': private method `join' called for "tranquil":String (NoMethodError)"
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<welandC>
What's the line of code?
<pilojo>
wolf1 = $wolves.to_s
<pilojo>
$IRCSocket.puts("NOTICE "+wolf1+" :You are an angel. Use kill in a PM/notice to kill any of the following players: "+$joinlist.each{|x| print x, ", "})
<welandC>
wolf1 = $wolves[index].to_s
<pilojo>
making a werewolf game right now
<pilojo>
whoops
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<pilojo>
i did have the index earlier
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<pilojo>
it's the same error, however
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<welandC>
$joinlist.join(", ")
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<pilojo>
welandC: look at the second error
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<welandC>
Then it doesn't recognize that variable as being an array.
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<welandC>
Did you initialize it as Array.new?
<pilojo>
$wolves = Array.[]
<pilojo>
does it need to be Array.new?
<welandC>
I don't know what Array.[] would do.
<welandC>
Do you play with irb when debugging?
<welandC>
Try a few lines in it.
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<pilojo>
welandC: i looked at the ruby docs, but i'll try Array.new
<Vivekananda>
welandC: could you look at my link too ? suggest what is expected of the answer?
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<Vivekananda>
I am not sure how values are stored in the reexes
<pilojo>
welandC: even with Array.new i get the same errors
<welandC>
pilojo: I'll take a peek if you post the code.
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<welandC>
Vivekananda: what is your question? What do you need to do?
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<welandC>
Print a list of movies with their ratings?
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<Vivekananda>
welandC: my question is here . I have tried all the outputs . I am getting quotes for all outputs. question asks me not to get quotes for titles
<Spooner>
welandC, You can create an array with just x = [] - Array.[] calls the index method on the class itself. It is the same as Array[]
<Spooner>
Vivekananda, You aren't getting quotes on all of them. When you print out a string it has quotes around it.
<welandC>
Vivekananda: You're outputting an array of strings. irb will put quotes around strings. If you puts the contents of the array, it won't contain strings.
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<Spooner>
pilojo, Use [] to create a new array, not Array.new (use Array.new when you want to pass parameters to the constructor).
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<Spooner>
pilojo, Also, try not to use global variables. They are horrid ;)
<pilojo>
Spooner: i still get the same errors as when i use Array.new or Array.[]
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<Spooner>
pilojo, There is a lot of code there. What is the error?
<pilojo>
Spooner: ehhh, they need to be accessed from many files, so i'm trying to keep them limited
<Vivekananda>
Spooner: welandC how do I print the $1 and $2 out so that I can observe what the value is and none of the quotes not quotes stuff
<pilojo>
Spooner: When i try to convert a value in an array to a string i get the error ":in `+': can't convert Array into String (TypeError)". When i use the .join function, i get "in `newgame': private method `join' called for "tranquil":String (NoMethodError)"
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<Vivekananda>
I tried print($1) but does not work
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<Spooner>
pilojo, You call #join on an Array, not on a String.
<Spooner>
pilojo, When concatenating strings, use interpolation, not addition.
<pilojo>
Spooner: err, don't know how to do that
<Spooner>
pilojo, "frog#{var}fish" not "frog" + var + "fish"
<pilojo>
ah
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<Spooner>
That automatically calls #to_s on var so it will be a string and happy ;)
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<Spooner>
Also, use #require_relative rather than an absolute path for #require.
<pilojo>
alright, i just started learning ruby on tuesday, so i'm still trying to get a hold of all the small features
<Spooner>
And don't explicitly require with .rb - just the base name is correct.
<pilojo>
Spooner: still getting ":in `+': can't convert Array into String (TypeError)
<pilojo>
" with interpolation
<Spooner>
You can't just stick an array into a string. How do you actually want it to be presented?
<pilojo>
$IRCSocket.puts("NOTICE #{$wolves[0]} :You are an angel. Use kill in a PM/notice to kill any of the following players: "+$joinlist.each{|x| print x, ", "})
<kseifried>
WHAAAAAA GLARGLE BLARGH!
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* kseifried
sighs and apologizes
<Spooner>
pilojo, You are still using + with a string then an array.
<Spooner>
You actually want "...following players: #{$joinlist.join(", ")}"
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<pilojo>
oh, ok
<pilojo>
so the problem was the end of the line? not the beginning
<Spooner>
each returns the array.
<Spooner>
Yes.
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<pilojo>
whoops
<pandawarrior>
hello people!
<Spooner>
Still, you learned about proper interpolation, so that isn't bad ;)
<pilojo>
not bad at all
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<pandawarrior>
cache.each_value {|val| print val}: leaves a '%' at the end
<pandawarrior>
how can i get rid of it?
<Spooner>
You need to give a bit more information, pandawarrior
<pandawarrior>
i have a hash and i want to print these on one line
<Spooner>
pilojo, Really, you want to be thinking about using classes, rather than globals + methods, but that is quite a big step up.
<pandawarrior>
print all the values
<Spooner>
And why does that "leave a % at the end"?
<pandawarrior>
but at the end of the line i get a percentge sign
<pilojo>
Spooner: i know C++, classes are not strange to me, but it's just that it's a new language, so i want to leave it basic for now
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<pandawarrior>
Spooner: not sure, that's what i was wondering..
<Spooner>
pilojo, Ruby is a lot more OO than C++, so you need to think about classes soon ;)
<pilojo>
oh?
<Spooner>
pandawarrior, At the least, I'd use cache.values.join instead.
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<pilojo>
i thought C++ was designed to be used for OOP because C wasn't OO
<pandawarrior>
Spooner: will give that a go, cheers
<Spooner>
pilojo, Yes, but there are degrees of OO. C++ is more OO than C, but that doesn't mean Ruby can't be more OO than that. E.g. even integers are objects in Ruby.
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<Vivekananda>
what is gold stars ?
<bnagy>
fry em? mash em? stick em in a stew?
<bnagy>
anyway, I don't know what you're looking at, and it's not really important - I gave you the answer, all you need to do is work out why it's correct
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<bnagy>
which is easiest to do by just messing with irb for 30 seconds
<bnagy>
or pry or whatever
<Vivekananda>
bnagy: I got it. It was on the tutorial page also
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<Vivekananda>
;P
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<Vivekananda>
is Array an instance of Class ?
<Vivekananda>
no right ?
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<Vivekananda>
bnagy: is Array an instance of Class
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<yoshie902a>
I'm trying to delete all records with a foreign key = 10, I tried, Documents.find_all_by_user_id(13).destroy_all, but I get a NoMethodError: undefined method `destroy_all' for []:Array. What am I doing wrong?
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<yoshie902a>
oops, sorry that was a rails questions
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<Vivekananda>
have to pick out correct choices. I thought only 2 is correct but I am wrong . Array is an instance of Class.When self is used within the definition of an instance method, it refers to the current instance of the class.Ruby supports multiple inheritance.Public methods of a class cannot be redefined after an instance of that class is instantiated.
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<Vivekananda>
have to pick out correct choices. I thought only 2 is correct but I am wrong 1. Array is an instance of Class. 2.When self is used within the definition of an instance method, it refers to the current instance of the class. 3.Ruby supports multiple inheritance. 2.Public methods of a class cannot be redefined after an instance of that class is instantiated.
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<Vivekananda>
anyone here ?
<Vivekananda>
fryguy: you around ? busy ?
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<fryguy>
Vivekananda: ?
<Vivekananda>
a question
<Vivekananda>
above
<Vivekananda>
I pasted
<Vivekananda>
I know that 3 is wrong
<fryguy>
i don't see a question
<Vivekananda>
have to pick out correct choices. I thought only 2 is correct but I am wrong 1. Array is an instance of Class. 2.When self is used within the definition of an instance method, it refers to the current instance of the class. 3.Ruby supports multiple inheritance. 2.Public methods of a class cannot be redefined after an instance of that class is instantiated.
<fryguy>
what's the question
<Vivekananda>
just pasted it above
<fryguy>
that's not a question
<Vivekananda>
have 4 choices and to pick the true one
<Vivekananda>
ok so my question is Array an instance of Class
<Vivekananda>
I think not coz first they are not objects
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<Vivekananda>
sorry everything is an object right
<Spooner>
Vivekananda, Try Array.class and find out for yourself.
<Vivekananda>
ok so Class.ancestors does not gimme Class
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<Vivekananda>
Spooner: hmm that gives me class
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<Vivekananda>
Also I know 3 is wrong
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<Vivekananda>
and so is 4 coz all methods of a class can be redefined whenever right ?
<Vivekananda>
public or private ?
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<dummies_freelanc>
hello i need write one script in ruby that parse csv to squlite3
<fryguy>
dummies_freelanc: plenty of CSV gems available, plenty of sqlite gems available, should be straightforward
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<bnagy>
Vivekananda: this is not #domyhomeworkforme
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<bnagy>
people here are happy to help, but will lose patience when you behave poorly
<bnagy>
examples include: highlighting people for no reason, pasting huge chunks of text over and over, begging for help when you clearly haven't even tested in irb
<Vivekananda>
bnagy: yep I know and dont wish to do that either. but to make a question intelligible I have to give the context. For example I tried Array.ancestors but it did not show the "Class" class. I did not know that it wont and hence marked it wrong
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<Vivekananda>
absolutely agree. Sorry to bother you. I thought you were around and I was trying to ask a question not doing it for no reason :(.
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<ntzrmtthihu777>
having issue includeing a gem, little help?
<Vivekananda>
HI again everyone. Can I use << on a.writer
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<ntzrmtthihu777>
*requiring a gem
<bnagy>
ntzrmtthihu777: could you rephrase that in terms of a question that can actually be answered? :)
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<bnagy>
95% of "I can't require x" are 1. You spelled it wrong 2. require 'rubygems' or 3. bundler sucks
<Vivekananda>
By a.writer I mean writer is an write accessor to the object
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<bnagy>
Vivekananda: that's not how att_accessor works
<bnagy>
it creates getter ad setter methods for an @ivar
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<bnagy>
so what you can do with it is entirely dependent on the nature of the ivar you're accessing
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<Vivekananda>
I have a variable which has a writer accessor. I am guessing ( not sure) that the return type on saying a.varX where varX has the write accessor would take an argument but return nothing
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<bnagy>
well don't guess. Write the code.
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<ntzrmtthihu777>
bnagy: well I need the rubysdl gem, so I put as the first two lines of my script require 'rubygems' and require 'rubysdl'/gem 'rubysdl', but it does not works.
<waxjar>
did you install the gem first?
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<ntzrmtthihu777>
yeah, not that n00bish XD. and my mistake, that error has left, lost my train of thought.
<Vivekananda>
I would need an example to write the correct syntax for it . I dont know how to test the return type for a method call
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<bnagy>
Vivekananda: you need to actually write some code in irb
<bnagy>
tryruby.org or something
<bnagy>
there is no 'return type' for a method call. A method will return an object.
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<Vivekananda>
bnagy: ok am trying to look for a few examples to write the code. Btw if you dont mind my asking , where are you from ?
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<bnagy>
lots of dofferent places
<bnagy>
something like tryruby or rubymonk ( I think ) or ruby the hard way etc will start you from 0
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<ntzrmtthihu777>
ah, that's what my problem was. even though I required rubygems and gem'ed rubysdl when I run the code it gives me uninitialized constant Bitmap::SDL
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<Vivekananda>
does a method always return something in ruby ?
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<snorkdude>
Anyone here have any experience writing oauth api wrappers?
<bnagy>
yes
<bnagy>
d'oh :) yes, a method always returns something
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<snorkdude>
Anyone here have any experience writing oauth api wrappers?
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<wald0>
in the last weeks i was interested on learn perl, but now i think that ruby is more interesting than perl, unfortunately i have not any book of ruby in my dir of ebooks, anybody can suggest me a good one ?
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<kseifried>
to rock around the clock IS TRICKY!!!!
<kseifried>
HER HAIR IS KIND OF CURLY!!!
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<wald0>
im thinking to learn ruby by using it with a set of C api libs (ffi bindings), this means that im not going to (almost) lose the speed impact uf using ruby instead of C ? (because these bindings in ffi comes from C ones)
<kseifried>
dude
<kseifried>
speed is an illusion
<wald0>
sorry for my english, i hope you* understand what i mean
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<kseifried>
illusion are sim,ply attachment to floompf
<wald0>
kseifried: aparently ruby is much slower than C
<kseifried>
yes and not
<kseifried>
so .. you want speed? use pythin
<kseifried>
python
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<kseifried>
also plz define speed =)
<wald0>
mmh, you mean that python is faster than ruby ?
<wald0>
performance*
<kseifried>
no
<kseifried>
define performance
<kseifried>
numerial? work queues?
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<wald0>
generically talking, so im not talking about something specific, just brainstorming about what ruby can give me and how
* kseifried
fires a 3.6cm rubber ball at 59.7M/s at wald0's head
<kseifried>
wald0, ": so...
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<kseifried>
what;s yer phone #
<kseifried>
?
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* wald0
confused
<Hanmac>
wald0 i wrote bindings for C++ libs, also 3D stuff that uses GPU ... i got the same FPS with ruby than with C++ thanks to the bindings
<kseifried>
so basically it depends
<kseifried>
yeah
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<wald0>
Hanmac: ah, thanks, thats what i wanted to know :)
<kseifried>
so for me, I'm the cloud security guy, so ruby is the glue language
<kseifried>
performance? who gives a shit
<kseifried>
it's all 8core 64gig ram beasts
<kseifried>
who cares
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<kseifried>
geht schnel! hooosh hooosh!
<kseifried>
=)
<right1>
i find myself waiting on network io most of the time
<kseifried>
uhmm sec
<right1>
ruby good enough for me and feeds my laziness by gixing me really convenient regex
<wald0>
kevinfagan: the ppl that is worried about performance, of course, and the poor ppl that runs slower computers like with 500 mb ram or less
<kseifried>
I did not now that part was public now
<kseifried>
know
<bnagy>
huh, nice
<bnagy>
I mean, I couldn't give a shit about rails, but having a proper software collection for reasonable ruby under yum is nice
<bnagy>
I just hate rpm distros, sorry :)
<right1>
yeah currently i only use ruby to generate java code and do simple web requests
<bnagy>
it's very old fear from experiences in the distant past
<right1>
im kinda annoyed by how empty the r-docs are for net::http but i guess i get enough out of it
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<kseifried>
so...
<kseifried>
shit where to start
<kseifried>
yeah
<kseifried>
bnagy, : honestly.. RHT is really trying to do the right thing
<kseifried>
on many levels.
* kseifried
points to the whole rubygems code signing BS/etc :P
<bnagy>
what do you consider 'cloud' anyway? I use a metric shitton of KVM virtual machines in a cluster
<kseifried>
bnagy, : call me =)
<bnagy>
and if you have stuff that lets me add some rubyness to that I at least need to look at it
<kseifried>
(206) 905-9462
<love_color_text>
my company loves RHT, but ive influenced them towards debian distros. seeing you right now kseifried, making an effort to support, makes me want to support RHT
<kseifried>
love_color_text, meh. so the cool thing ith RHT is we contribute a lot ot upstream
<kseifried>
why? because we are lazy =)
<kseifried>
if upstream fixes it we don't have to
<kseifried>
love_color_text, : also we make installer and shit so it all "just works"
<kseifried>
which is useful too
<kseifried>
to use and to you
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<kseifried>
low: you know fwiemer?
<kseifried>
love_color_text, rather
<love_color_text>
no i dont
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<bnagy>
kseifried: if you have some relevant tech, shoot me some links and I'll check it out. I had awful problems before with centos / infiniband and bleeding KVM stuff, but I guess I could look at FC
<kseifried>
bnagy, pign me on skypre
<kseifried>
kurtseifried
<bnagy>
otherwise I'll google around at some point
<wald0>
if i want to move from bash to ruby, how its meant to be used the commands ? (my bash scripts is almost running commands)
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<bnagy>
wald0: ruby isn't a shell, but you can use shebangs to make ruby scripts into 'commands'
<bnagy>
kinda
<kseifried>
uh,... system()?
<kseifried>
shebangs? hah. I wish shebang me ;)
<kseifried>
bnagy: "phone" me or skype my ass. I'm old. irc is text shizzle
<wald0>
bnagy: can you give me a fast example ?
<love_color_text>
bnagy: yep that's what i consider cloud too. i host my sinatra/rails/ruby apps with on debian guests under a KVM. the host is Centos but once I had KVM it was hands off
<kseifried>
I really need to push my cloud presentation out publicly
<kseifried>
but in a nbutshell
<wald0>
kseifried: why you want so much skype ?
<wald0>
kseifried: help
<kseifried>
wald0, I am 35. I have twin boys, 2.5 yars old. they have utterly fucked up my arms
<wald0>
kseifried: commands
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<kseifried>
so talky talk = less pain
<bnagy>
wald0: #!/usr/bin/env ruby \\ `rm -rf /`
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<wald0>
bnagy: using `` ? mmh, doesn't looks very reliable
* kseifried
can now crack his ankles, arms. wrists, neck, shoulders and rib cage
<kseifried>
I can literally
<kseifried>
turns 120degree and Crr-rr-RACK myselg
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<wald0>
bnagy: suppose that i want to use the rsync command over 2 directories, which are meant to be used with variables, how i should do that ?
* kseifried
snaps his ankles and sighs
<love_color_text>
kseifried: sending you a skype request. next time my CTO asks me if we should consider Red Hat I'll skype you
<wald0>
kseifried: !shutdown
<kseifried>
love_color_text, works for me
<love_color_text>
thanks
<bnagy>
wald0: you can do interpolation `scp #{from} #{to}`
<wald0>
ah, this looks a little better, hum
<kseifried>
love_color_text: no see your request yet
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<wald0>
bnagy: this seems to be a better method: %x( echo -e "a\nb\nc" | grep b )
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* wald0
starts to like ruby
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<cryptopsy>
how to uninstall rvm after running $ \curl -L https://get.rvm.io | bash -s stable --ruby
<cryptopsy>
?
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<MrZYX>
rvm implode
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<Hanmac>
or rvm self-destruct :P
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<cryptopsy>
can't find lvm
<cryptopsy>
rvm*
<MrZYX>
then rm -Rf ~/.rvm
<cryptopsy>
thanks
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<platzhirsch>
Any idea how I can access the HTTP header values in a hash-key fashion? WIth Net::HTTP.start I open a block and read the header with http.head('/'). Now I can only iterate with .each over the key value pairs, but [] accessor does not work
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<sanjeev>
hi
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<spygame>
hey, i'm playing around with RTanque and building my own bot. i wanted to know if there's a way i can detect enemy fire. For example if some bot aims and fires at me can i use sensors to detect fire coming at me ?
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<peta_>
hi guys
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<Xeago>
yesterday i bbq'ed today it snows
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<Vivekananda>
cha1tanya: thanks that site worked and now on enter I have the indent too. I have two other things though that bother. One is that everytime I open emacs it changes to some font color and background but I wanted to change that to another. I go to options and choose and then when I restart it is still the same
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<Jueecy>
Morrolan: that fixed my issue, thanks
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<Morrolan>
Jueecy: Good to hear. :)
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<Mattix>
how do you tell what gem is using if you require curl or curb?
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<Mattix>
in both cases I have Curl::Easy, so I don't know what lib I'm using...
<Mattix>
ah, it's "gem which", I guess
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<Mattix>
ok, gem which curl and gem which curb gives me the same, are they alias or what?
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<shock_one>
shevy, yes, if you have functions with the same names in both, they will be overwritten.
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<shock_one>
Or, rather shadowed.
<ddd>
the last one loaded will win
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<shevy>
hmm
<shevy>
I wonder if this is the same with load() as well, in the above example
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<shevy>
apparently, in the past, I put requires even in the middle of a .rb file
<shevy>
today this confuses me
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<Vivekananda>
hey there
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<Vivekananda>
everyone
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<shevy>
Vivekananda hi
<shevy>
Vive Kanada!
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<Vivekananda>
shevy: lo why did you separate it out ? :)
<Vivekananda>
so I am learning ruby and did somequestions yesterday
<Vivekananda>
today am going to try some programming
<shevy>
Vivekananda I dunno, it seemed easier to read for my poor eyes
<shevy>
wedontwritelikethishereeither,yousee?
<shevy>
good
<shevy>
ruby is an elegant programming language
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<shevy>
but you must "think" in it
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<shevy>
it's like cooking
<shevy>
you put stuff into a pot, heat it, and hope that something useful comes out
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<shevy>
in ruby you do that usually by invoking .methods on an object
<Vivekananda>
shevy: :). It is a name and the combination means something but separating wont unless you do it the right snake_case
<Vivekananda>
so vive_kananda wont but vivek_ananda would
<Vivekananda>
if you really want to separate it that is
<Vivekananda>
:)
<Vivekananda>
although the combination has a much better meaning :)
<shevy>
yeah
<shevy>
seems IRC names are not allowed with ' ' inside
<shevy>
:(
<shevy>
else I would be called "s h e v y"
<shevy>
hahaha
<Vivekananda>
lol
<Vivekananda>
so shevy where are you from ?
<Vivekananda>
me you can guess I guess
<Vivekananda>
:)
<shevy>
Vivekananda central europa, austria, vienna
<Vivekananda>
oo nice. The land of arnold
<shevy>
Vivekananda well that could still be many towns, so I dont know
<shevy>
Vivekananda he abandoned it for the big USA :(
<Vivekananda>
Well yep sadly but that is is how I know him so .... :)
<MrZYX>
that's a loss? :P
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<Vivekananda>
MrZYX: Leaving one's own country to me is one of the bad things to do
<Vivekananda>
I am currently in US though but completely leaving mine
<Vivekananda>
would be sad
<MrZYX>
hm guess I'm not very pariotic
<shevy>
Vivekananda well, big countries can be very appealing
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<shevy>
and Arnie wanted to make money
<shevy>
and father ten children with 6 different women :P
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<shevy>
MrZYX are you pariotic, parrotic or patriotic? ;)
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<shevy>
I think after the internet, old nation boundaries are not that important anymore
<MrZYX>
^
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<MrZYX>
well, not sure if I would say because of the internet, but general globalization
<Vivekananda>
MrZYX: More than being patriotic is about origins of oneself. I cannot but revel in that whereever I go.
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<MrZYX>
there's nothing to protect anymore
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<Vivekananda>
shevy: and MrZYX btw I am very new to ruby and trying to get hands on code snippets to run. You guys okay if I ask stupid questions :(
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<MrZYX>
sure, that's what this channel is for ;)
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<Vivekananda>
like what is a method or what does it do ? I will try running it but sometime people get irritated pretty fast by stupid questions
<shevy>
Vivekananda you must ask
<shevy>
Vivekananda, do you know what a function is
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<ddd>
think of a method as a verb. its an action some object can take.
<Vivekananda>
no . Right now I am doing problems from an online course and this is not homework from college but I just want to learn
<shevy>
Vivekananda questions are ok, sometimes people do not read the answers though
<Vivekananda>
so am tryinig
<ddd>
like class MyClass ; def say_hello ; puts "Hi there!" ; end ; end
<shevy>
Vivekananda ok do you know unit operations or streamline processing... like in chemical engineering. a function, takes input, modifies it, and can give you output, ok?
<Vivekananda>
right now I know basics a little eg variable assignment and then small loops and not very sure of how to write things like a split or reject
<ddd>
when you do myClass = MyClass.new ; myClass.say_hello you see how its a verb? its 'doing' something? thats a method.
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<shevy>
Vivekananda a method is just a function that is attached to an object
<ddd>
methods do something as opposed to variables which hold something (the 'state' of that object)
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<shevy>
cat.meow()
<Vivekananda>
the first question is to design a palindrome and my approach is to
<shevy>
Vivekananda palindrome is easy. ATTA
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<shevy>
split in the middle, then proceed one way and check if it is the same character on the other way
<Vivekananda>
shevy yes I knwo but I want to code it
<shevy>
AT|TA
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<shevy>
split up the task
<shevy>
1) split into middle of string
<shevy>
"ATTTTA".size / 2 # => 3
<Vivekananda>
shevy lol now see that is what I did not know. I was trying to get the input in one string then call reverse on it to get the reversed string and then do a comparison
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<ddd>
and that doesn't actually modify thye string. it just counts the number of elements (characters) and then uses that result in the / 2 portion, returning the result (3)
<Vivekananda>
shevy first , what does #=> abracadabra mean ?
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<Vivekananda>
I see that at a lot of places but dont understand
<ddd>
output from irb session
<julian-delphiki>
#=> just means the result
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<ddd>
irb (interactive ruby) uses that to show the output/result of something
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<ddd>
type irb at your console, then type in 3 + 3
<ddd>
you'll see the same thing he showed
<Vivekananda>
julian-delphiki: so it is just like a ruby comment ?
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<ddd>
the # usually gets tacked on to distinguish it from the hash rocket (=>)
<Vivekananda>
julian-delphiki: if you are talking to me I can honestly say , I know only english and my country's language and nothing else. :(
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<Vivekananda>
I cannot understand what you are saying
<Vivekananda>
ddd: I am reading your lines
<ddd>
he was passing something to the channel bot
<ddd>
the >> there was for the bot to pick it up and know it was being spoken to
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<Vivekananda>
so ddd and shevy will my logic work . I guess it would right ?
<MrZYX>
yup, it will
<ddd>
sorry, was looking elsewhere. yes, as MrZYX said, it will
<shevy>
Vivekananda #=> is just common return in IRB, do you know IRB?
<Vivekananda>
I have been trying it since yesterday
<shevy>
Vivekananda start IRB and then do: class Test; end; test = Test.new
<shevy>
ok good
<shevy>
keep on using it
<Vivekananda>
for returns I usually click return
<shevy>
eventually your brain will understand things
<shevy>
click??
<shevy>
do you use windows?
<Vivekananda>
nope
<Vivekananda>
linux
<ddd>
he's probably using a browser based irb session thing
<shevy>
ohhhh
<shevy>
I see
<Vivekananda>
ubuntu
<Vivekananda>
I dont like windows much
<Vivekananda>
lol
<ddd>
ubuntu doens't have you click anything for irb
<Vivekananda>
after started using ubuntu
<ddd>
you open a terminal, type in irb and use it (if you have ruby installed)
<ddd>
no clicking
<Vivekananda>
o no I meant I just key in irb at the cli and it starts
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<Vivekananda>
yes I know
<Vivekananda>
did I say clicking somewhere ?
<ddd>
oh you use ubuntu's command lancher. i get it
<ddd>
yes
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<ddd>
Vivekananda | for returns I usually click return
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<Vivekananda>
ddd no no I just open a terminal plain and simple and key in irb and it gets me to the irb prompt
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<Vivekananda>
then I type the code or type in emacs and past it and then press return
<ddd>
well thats why shevy was like 'click???'
<ddd>
it made no sense
<Vivekananda>
is all I do
<Vivekananda>
ooo sorry my bad then
<shevy>
ewww ubuntu :P
<Vivekananda>
lol
<Vivekananda>
hahaha
<ddd>
hey leave muh ubuntu alone :)
<shevy>
Vivekananda I tell you how I use things here
<ddd>
since the dogs pissed on my MBP and fried it, its either windows, or linux. and for linux i prefer ubuntu
<Vivekananda>
if I did not better or know anything I would guess you are a gal shevy
<Vivekananda>
lol
<shevy>
for IRC, I have xchat running in a window that fills 70% of my screen, in the lower left I have KDE konsole
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<ddd>
(told my friggin wife to put them in the cage overnight, but nooooo, what do *I* know)
<shevy>
Vivekananda nah, I am male
<Vivekananda>
ahh okay my bad again
<Vivekananda>
ok enough bads
<ddd>
Vivekananda: wouldn't matter. many ectremely smart and talented women coders
<shevy>
Vivekananda in bash, I use "q" to toggle between bash, and irb
<ddd>
err extremely even
<shevy>
so I type q, and IRB is started. I press q in irb, then I am back to bash again
<shevy>
this way I can very quickly test ruby code
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<Vivekananda>
so guys now I have the logic and am trying to code but that is the hard part
<ddd>
i run a screen or tmux session with multiple tabs.
<ddd>
to each's own
<Vivekananda>
lol coz normally that is supposed to be the easy part
<shevy>
ddd I never managed to get into screen :(
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<MrZYX>
Vivekananda: only in the beginning, soon the logic will become the hard part ;)
<Vivekananda>
yes and that would be better
<ddd>
i don't like screen compared to tmux, but having an issue with display when running irssi in it
<shevy>
Vivekananda just break up things into sub-tasks, and solve them
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<ddd>
so using screen for now until i figure out wtf is going on
<shevy>
ddd I kinda love GUIs
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<Vivekananda>
so now I know my logic but I dont own the tools. How should I go about it. Eg how do If find that if I say normalString = inputString ; will not be wrong code
<ddd>
like i said to each's own. been using linux since kernel 1.0.8, so i've been command line most of my 'career' with computers
<ddd>
never really got into guis. *I* find them to get in my way a lot. but thats probably because i've been a command line freak for so long
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<Vivekananda>
and then reverseString = inputString.reverse something something
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<Vivekananda>
ddd in that casee I would like to get some tips from you
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<shevy>
ddd the perfect GUI has not been built yet, indeed
<Vivekananda>
one thing for sure that I recall now is suppose I want to copy files
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<Vivekananda>
from one folder to the other
<ddd>
cp -ax or cp -R
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<ddd>
if you want to recursively copy
<shevy>
Vivekananda just use aliases
<shevy>
I use cpr for cp -R because I am too lazy to type
<ddd>
hehe
<ddd>
took longer to set up the alias than it does to type the char ;)
<Vivekananda>
now for the gui it is easy to pick the ones I need and say copy and then paste it works. But to do that in a cli would be a monumental task
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<Vivekananda>
coz I am not doing -R and not doing something like cp all text files
<Vivekananda>
so not doing cp -R *.txt
<ddd>
Vivekananda: oh regexp works for that. like if you want to copy all .rb files from one dir to another then: cp -R *.rb newdir/
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<Vivekananda>
so how do I use cli for this
<ddd>
or remove the -R if you only want those in the current dir
<Vivekananda>
ddd that is what I meant. Suppose the files I want to copy are -- video and music and then hmm let us see okay one source code one and leave the rest
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<ddd>
or expandively you could do: find ./ -type f -name *.rb -exec cp {} newdir/ \;
<ddd>
or something like that
<ddd>
:)
<Vivekananda>
this kind of pick and choose I can do in GUI but in cli it would be like doing it 10 times for each file
<Vivekananda>
sorry one time for each file
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<ddd>
cp *.{mp4,mpeg,mp3,mov} newdir/
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<ddd>
add -R to go through all subdirs, you can 'man cp' to see the switch(es) to limit how deeply to recurse
<Vivekananda>
but I will go to these things later I guess. coming back to the problem. Guys please tell me how to go about finding things out. For example how does the .reverse work.
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<ddd>
that would copy all files ending in mp4, mpeg, mp3, and mov to the new dir
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<ddd>
it works by writing out each character starting at the last one and workin backwards. (think of the string as an array. so it goes from String.length and basically works back to element 0 in the string outputing the result at the end
<ddd>
)
<Vivekananda>
ddd yes but you will have to know what the suffix is for them. I am trying to explain the predicament that suppose I just use the mouse. then I include all folder + files I want in a single sweep and do cut and paste in a separate location
<Vivekananda>
not so fast or simple in cli right
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<ddd>
no not really since i doubt there's a lot of commonality between everything except extension
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<ddd>
you could write a script i suppose that used 'head -n1' to look at the first line of each file or use 'file' to see what type it was and then do whatever you wanted. but you'd have to write it first
<ddd>
nowhere near as fast at cmdline for stuff like that. thats where GUIs shine (or at least eh libs they're built with)
<Vivekananda>
ddd for the .reverse, I used it as a generic case and what I meant was 1. I know that there is a method like that but I now need to know it well and how it is used and a few examples. where do I find all these. 2. how do I debug code in say emacs ( I think I will use the irb but does it debug too ) ?
<ddd>
:shrug: which is why i say to each's own
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<ddd>
you find it by looking at ruby-lang.org's site under Documentation and look at core and stdlib
<ddd>
or use ri to hunt for docs (like 'ri .reverse')
<ddd>
as you get more and more familiar with ruby you'll have to hunt less and less, except for more esoteric things
<MrZYX>
(click Methods, type reverse in the search)
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<Vivekananda>
hey does ruby have pointers too !!
<Vivekananda>
omg
<ddd>
no you're seeing the C source that implements that method
<Vivekananda>
oww that is bad news :(. I am learning pointers but not nearly there
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<Vivekananda>
oo okay
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<ddd>
gotta go. wife and kids are home
<Vivekananda>
okay
<Vivekananda>
so that page is helpful and gave me what happens with reverse. Now my question is how do I see more examples
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<MrZYX>
examples for reverse?
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<Vivekananda>
MrZYX: yep but I guess I can now just try on irb. but what would be great to go to a site which gives me all the nitty gritty things about reverse eg what will happen if I try to reverse something like a => (" I am :*(&&*) a good person) and then s = " a , \" I am happy" " and then s.reverse
<Vivekananda>
or something like dont do this or do that
<Vivekananda>
kind of things with examples
<MrZYX>
for "what will happen if"-questions you have irb
<MrZYX>
just try it out
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<Vivekananda>
yep I knwo that but also the thing is --- for things like what I should know about ruby strings it would be good to have that and examples somewhere otherwise I will never knwo those things that I have not tried out but are essential to know
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<julian-delphiki>
typically you would just read the docs
<julian-delphiki>
you could also do project euler problems
<MrZYX>
yup
<julian-delphiki>
or ruby koans
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<Vivekananda>
julian-delphiki: thanks for the helpful stuff
<Vivekananda>
so I have to locate the site for the project euler problems
<Vivekananda>
I liked the ruby monks approach though
<Vivekananda>
like give you some reading then a problem based on it then more reading and so on
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<Vivekananda>
that helps
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<Vivekananda>
julian-delphiki: were you referring to the docs link that MrZYX gave me above. I found another link for ruby and am confused which is what
<MrZYX>
they are all the same, just different formats
<Vivekananda>
shevy: lol well kind of. Not confused but have lesser tools at the moment.e.g I see that I need an array or a comma separated list or something similar to iterate
<Vivekananda>
but I dont know now how to iterate over the String I have
<berdario>
but it doesn't explain why this is... only that "sourcefile is std-in"
<Vivekananda>
Btw shoudl I install ri ? MrZYX ?
<berdario>
if I run a script with "ruby -rdebug file.rb" I don't have such a problem
<Vivekananda>
It is not there in ubuntu as a default
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<berdario>
but, even weirder: the behavior on jruby is different
<shevy>
Vivekananda you can split up a string
<shevy>
Vivekananda test it in IRB always
<MrZYX>
Vivekananda: give it a try, give all the different online docs a try, give the local html documentation a try, give pry with pry-doc a try. Choose the tool that you like the most
<shevy>
Vivekananda, one way is this: "abc".split(//) # => ["a", "b", "c"]
<shevy>
Vivekananda .split will give you an Array. you can use .each on that array to iterate over it
<shevy>
*over its contents
<berdario>
(whoops, I just realized that the SO answer I linked isn't the right one)
<shevy>
Vivekananda, The three core classes of ruby are String, Hash and Array. there are also Numbers (Fixnum, Integer etc..) but they are not that important compared to the other 3
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<MrZYX>
shevy why not String#each_char for your example?
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<berdario>
shevy: have you ever used the debug module?
<shevy>
MrZYX dunno really
<shevy>
berdario nope, my software is never allowed to become too complex
<berdario>
ok, is someone here who does?
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<Vivekananda>
So another question. when I do this a = "Hell0" then b = a then a =" hi " and then print b it is still hello
<Vivekananda>
how does this work A?
<Vivekananda>
sorry work ?
<Vivekananda>
ie. why is b not hi ?
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<berdario>
Vivekananda: `b` is a reference to the string "Hell0", not to the object `a`
<MrZYX>
"Hell0" and "hi" are the objects, with a = "Hell0" you store a reference to the object in a, with a = b you copy that reference, with b = "hi" you overwrite that reference, not the object
<catphish>
a = "hi" creates an instance of string and assigns it to the variable a
<berdario>
(not sure if "reference" is the right terminology for ruby)
<catphish>
it doesn't modify the object that a pointed to before
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<Vivekananda>
so in the last step b is pointing to hello and a changes ?
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<Vivekananda>
I encountered another thing the other day in java and was curious
<berdario>
yes
<catphish>
try a.replace("hi")
<catphish>
that will modify the object that both variables point to
<catphish>
but otherwise, "variable = something" will just change where that variable points, it wont affects the object it pointed to
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<Vivekananda>
so what happened was that I defined a field f = new A; then inside a method I did -- void mymethod(int f) { f = new B }
<Vivekananda>
now when I print the value of f it gave A whenver outside but always gave B when inside that method
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<catphish>
that's C code
<catphish>
try ruby
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<berdario>
he said Java... btw in java you ought to have void mymethod (Integer f)
<berdario>
not `int`
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<catphish>
oh ok
<berdario>
(if I remember correctly)
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<Vivekananda>
On the other hand I know that if I do f = new A ; void mymethod( ) { f = x } then f changes and is the same f that is declared int he field outside
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<MrZYX>
yup that is called scope but has very little to do with changing the reference vs the object itself
<Vivekananda>
no but I was curious if the same thing happens in ruby . I was told that this happens across languages and also there is something called shadowing
<Vivekananda>
:)
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<heftig>
berdario: no, int exists as well
<Vivekananda>
but guess will first try running my program
<heftig>
berdario: Integer is the boxed type (an int contained in an Object)
<Vivekananda>
heftig: is the primitive an Integer the class
<Vivekananda>
so I guess it can take an argument of the type int
<berdario>
heftig: yes, but I don't think that you can assign an Object to a value type
<catphish>
i avoid stacking identically named variables at all cost
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<berdario>
(I know about autoboxing, but I think the compiler would complain... I'm not 100% sure btw)
<heftig>
well, right. you can't create an int using "new"
<Vivekananda>
berdario: Oo ok that is what you meant , yep yep you are correct
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<Vivekananda>
I should have written object f or something
<heftig>
though maybe if you B was Integer, the compiler would automatically unbox
<heftig>
s/you //
<Vivekananda>
Integer works though
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<heftig>
it'd be the same in java, by the way. String a = "foo"; String b = a; a = "bar"; doesn't change b, either
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<berdario>
heftig: maybe you can help me? I was trying to understand the debug module
<heftig>
debug module?
<berdario>
heftig: yes, "-r debug" as an argument or "require 'debug'"
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<heftig>
never used that, sorry
<berdario>
heftig: do you know someone who does?
<heftig>
no
<berdario>
ok, btw... if you have a ruby script with you
<berdario>
if you launch ruby -rdebug script.rb
<berdario>
and then press "l"
<berdario>
you'll see the source code of the script
<berdario>
but if you put require 'debug' in your script, and launch it with "ruby script.rb"
<berdario>
and then press "l"
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<berdario>
it'll complain, with "No sourcefile available"
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<berdario>
actually, it'll say "No sourcefile available for script.rb"
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<artofraw>
does it make a difference if you do array.uniq; array vs. array.uniq! as the last lines in a method definition?
<Vivekananda>
btw everyone how do I run multilines in the irb ?
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<Vivekananda>
like run after entering the entire code ie more than one line ?
<berdario>
and this is quite weird, given that the pwd shouldn't have changed
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<berdario>
Vivekananda: it'll run every expression right away
<berdario>
that is, it'll define a class, as soon as you close the definition with the proper "end" token
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<Vivekananda>
berdario: yes but I wish to run like five lines together
<Vivekananda>
if it runs each line wont that mess up things ?
<Vivekananda>
also I have ruby 1.8 . Should I upgrade to ruby 2.0 ?
<Vivekananda>
on ubuntu I mean ?
<berdario>
Vivekananda: ok, then you might try to put all the lines on a single one, and separate the expressions with ";"
<MrZYX>
artofraw: yes, bang mehtods tend to return nil if nothing was changed
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<MrZYX>
Vivekananda: yes
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<MrZYX>
ruby 1.8 support will end soo
<MrZYX>
n
<Vivekananda>
hmm . ooo I see that if I copy and paste lines from the text editor it runs all the lines as a whole
<MrZYX>
and you shouldn't learn an outdated language anyway
<Vivekananda>
MrZYX: hmm so which is the latest ?
<MrZYX>
2.0
<berdario>
Vivekananda: I don't know how much you're copypasting, but you're better off requiring the module (and possibly using debug, or a fancier shell like pry)
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<artofraw>
MrZYX: but with sort! this is not the case
<Vivekananda>
hmm
<berdario>
Vivekananda: unfortunately, the debian packaging for ruby isn't really up-to-date imho... you might want to use some of the tools that'll manage your ruby install
<Vivekananda>
okay one things at a time I should first upgrade to 2
<Vivekananda>
berdario: oo ok . Then how to do it ?
<berdario>
I use rbenv, but there're also rvm and other tools
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<MrZYX>
artofraw: tend to ;) my rule of thumb is to assume they do if I don't know better
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<Vivekananda>
berdario: okay so I download this script ( is it ? ) and install it ? Also I dont wish to install test versions/nightlies
<Vivekananda>
will it do that ?
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<MrZYX>
berdario: in ruby you require files not modules or packages ;)
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<berdario>
Vivekananda: yes, you can install stable versions... but unfortunately the install process will actually compile the interpreter on your machine, so that's not as fast as apt-get installing something
<berdario>
MrZYX: uh, you're right... I'm somewhat new to ruby
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<MrZYX>
it's okay, just saying
<Vivekananda>
MrZYX: so I shoudl go for chruby or rbenv?
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<berdario>
Vivekananda: another nice thing you'll get with these tools, is that (aside from having the latest stable ruby), you actually have different environments (one for each project, for example) and all of them are in your $HOME tipically, so you can install gems without root privileges
<Vivekananda>
I have no clue what gems are
<MrZYX>
Vivekananda: tried neither, I'm somewhat still stuck to RVM
<Vivekananda>
I started ruby like one day ago
<Vivekananda>
stuck ??
<Vivekananda>
you mean that is good ?
<MrZYX>
well, many people are switching to rbenv or chruby
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<Vivekananda>
hmm okay then rbenv it is
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<Vivekananda>
now I will have to first uninstall ruby and ri ?
<MrZYX>
no
<Vivekananda>
or do I proceed from here itself ?
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<MrZYX>
just follow the readme for rbenv, do not make any additional assumptions ;)
<Vivekananda>
also does it install ri and the pry by default ?
<xll11>
Anyone vouch for Pragmatic ruby pickaxe book
<xll11>
?
<berdario>
Vivekananda: you don't need to remove anything, it can coexist with no problems
<Vivekananda>
okay
<Vivekananda>
berdario: the thing is I have a ver old comp and very less space
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<Vivekananda>
reading the steps. during the first one it says using git to clone the current version but the current is not the most stable versoin
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<Vivekananda>
how do I clone the stable one ?
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<waxjar>
Vivekananda, it's in the README...
<waxjar>
under upgrading, ill give that, but still
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<Vivekananda>
waxjar: IN the readme it says This will get you going with the latest version of rbenv and make it easy to fork and contribute any changes back upstream.
<Vivekananda>
so that is the latest versoin ( might or might not be the stable one :()
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<waxjar>
[21:09:23] <waxjar> under upgrading, ill give that, but still
<berdario>
Vivekananda: that's only rbenv though
<Vivekananda>
okay
<Vivekananda>
so I am fine with installing that berdario ?
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<oponder>
Vivekananda: Sometimes you just gotta try something and see what happens
<berdario>
Vivekananda: yes, generally I wouldn't worry terribly about using the latest revision of a small and well tested software
<Vivekananda>
berdario: ok sure I am trying it
<berdario>
(that is, rbenv is somewhat small, ruby itself is huge)
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<oponder>
its good to become resourceful on your own. Give it a good 45mins of googling, trying stuff, and looking through the docs before asking a question. Looking up information is a skill like any other that can be trained and practiced.
<berdario>
oponder: Vivekananda whoops, I just checked apt-cache right now out of curiosity
<berdario>
turns out that maybe you can actually apt-get install rbenv
<Vivekananda>
oo nice
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<Vivekananda>
but what version ?
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<Vivekananda>
apt-get is normally behind a little isnt it ?
<berdario>
(I installed it from git, also because to me the bash/zsh integration is of no use since I don't use either)
<berdario>
I'm on ubuntu 12.10, and the version is 0.3.0-1
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<Vivekananda>
in apt-get the available versoin is 0.1.2
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<Vivekananda>
I am on ubuntu 12.04 but not gnome , lubuntu
<Vivekananda>
so should I go the git route ?
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<berdario>
Vivekananda: yes, it's probably more bothersome to deal with an older version that to handle things with git
<Vivekananda>
yep
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<Vivekananda>
my thoughts ar ethe same
<berdario>
apparently, rbenv doesn't have a branch for each release... maybe they have a tag for 0.4... and you could probably checkout it to avoid staying on the bleeding edge
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<Vivekananda>
berdario: command ?? how to I mean ?
<artofraw>
is there a point passing instatiating a block variable if it's not used anywhere inside the block?
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<berdario>
Vivekananda: I've never used git tags
<MrZYX>
git checkout tagname
<Vivekananda>
MrZYX: currently I have $ git clone git://github.com/sstephenson/rbenv.git ~/.rbenv.
<MrZYX>
yup
<Vivekananda>
so what changes here ?
<MrZYX>
that will clone the repo
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<MrZYX>
then cd into it
<MrZYX>
git tag to list the available tags
<Vivekananda>
yep ok
<Vivekananda>
let me proceed then
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<Vivekananda>
so cloning the repo does not harm ?
<MrZYX>
how could it?
<Vivekananda>
I mean will it not clone and copy the bleeding edge version too ?
<MrZYX>
a git repository always has the full history
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<Vivekananda>
hmm okay. So then when I am cloning , am I getting the building binaries for all earlier versions too ? even ones I dont plan to use ?
<bean>
no
<MrZYX>
what are"building binaries"?
<bean>
its probably building the rbenv stuff.
<MrZYX>
rbenv is not just shellscript?
<Vivekananda>
hmm What I understood( incorrectly ?) is that the repository contains all the code for any program or atleast the executables for it with all the revisions
<Vivekananda>
so if I clone it it means I am getting all those files no ?
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<Vivekananda>
I am on the step---- $ exec $SHELL -l
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<Vivekananda>
how do I exit this shell and also what do I use this shell for aprt from install ?
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<wald0>
im learning "ruby in twenty minutes" and im starting to love it, playing with irb, and I have a question: how i can enable "tab" to autocomplete things like Math.sqrt ?
<Vivekananda>
wald0: not sure if an interactive shell would do that
<MrZYX>
wald0: uhm, use pry? :P
<wald0>
Vivekananda: well, in fact im more interested to have such feature on my editor (vim), any tip ?
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<Vivekananda>
MrZYX: would be the man. I started only yesterday :)
<Morrolan>
require 'irb/completion' if you don't want to use pry for some reason. ;)
<berdario>
Vivekananda: you don't strictly need to exec, to exit the shell you can just close the gnome-terminal
<Vivekananda>
berdario: I am trying to return to the main prompt
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<wald0>
MrZYX: thx, looks interesting, im going to give a try :)
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<wald0>
when i do "gem install something" it is installed in user/local mode ? (and where? linux/debian)
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<berdario>
Vivekananda: do you already have ruby-build installed?
<Xeago>
wald0: I have tab completion in irb, thought it came by default
<Vivekananda>
MrZYX: I cloned the repo and cd d into it and tags give me v0.3.0 and v 0. 4. 0
<artofraw>
at runtime, I have this http://pastie.org/7356077 and it doesn't generate warnings for the unused block params (a & b)
<artofraw>
I thought it should..
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<cantonic>
hey there. can anyone recommend a ruby framework similar to Rails for writing mobile apps? (android and ios)
<Vivekananda>
berdario: are you there or gone ? MrZYX
<Xeago>
cantonic: sinatra is cool
<Vivekananda>
not sure of your time zones so probably should not ping
<cantonic>
Xeago: for mobile apps?
<Xeago>
also look at padrino if you want a more 'complete' experience
<Xeago>
cantonic: define mobile apsp
<cantonic>
Xeago: native apps for android and ios
<Xeago>
html+javascript+css designed for smaller screens
<Xeago>
and you are looking for something like rails?
<cantonic>
Xeago: i would use Rails for mobile websites, but i need to write native apps now
<Xeago>
ie. a web development stack
<cantonic>
yeah
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<Xeago>
my recommendation is when going native stay native and abstract at the data
<cantonic>
i am pretty familiar with rails. I know that mobile app development is made with native C, but maybe there is a ruby framwork which works well
<Xeago>
what?
<Xeago>
native c, you can't run native c on tons of devices
<apeiros>
actually it's objC for iPhone and java for android
<Xeago>
iOS won't let you run native-c, it will only let you run c as objC
<apeiros>
don't know about windows phone, but who would f'ing care?
<cantonic>
Xeago: i have heard of http://mobiruby.org/ but don't have any experience with it
<Xeago>
(and c as objC is different)
<Xeago>
there is rubymotion
<Xeago>
or soemthing like that
<apeiros>
yupp
<apeiros>
and ruboto for android
<apeiros>
(rubymotion is correct)
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<cantonic>
thank you guys. that was what i was searching for. Does anyone have experience with mobiruby?
<cantonic>
or is that something completely different?
<Xeago>
I have used mruby, but I doubt it is comparable
<jdrap>
can someone give some link about "mobiruby vs ruby motion" ??
<jdrap>
or some advice
<jdrap>
I can't find something clear
<Xeago>
jdrap: try it yourself
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<jdrap>
I already have a ruby motion license and I think that it is awesome
<cantonic>
Xeago and apeiros: thank you guys. I will try them out. Hope there are not many downsides of using ruby frameworks for mobile app development
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<jdrap>
I'm gonna give a try to mobiruby as well :)
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* apeiros
has a rubymotion license too and still not used it :(
<apeiros>
bought it the very hour I heard about it
<Xeago>
apeiros: is time the limiting factor?
<berdario>
Vivekananda: I'm back... my brother killed the power of the access point... and then I had to help out my mother to create a pdf out of a csv -_-
<cantonic>
jdrap: would love to read about your experience. are you blogging it somewhere?
<Vivekananda>
hmm nice
<Vivekananda>
you mom does CS too ?
<apeiros>
Xeago: to a good extent, yes
<Vivekananda>
wow !! nice
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<Xeago>
apeiros: bummer, thats the hardest thing for me to help with..
<Vivekananda>
my computer says rbenv not installed
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<Vivekananda>
I wonder why
<cantonic>
i wish we could just use a framework like Rails and still use all the functionalities of a mobile phone
<Xeago>
cantonic: that statement makes no sense
<cantonic>
Xeago: why not?
<Xeago>
and would give you a really insecure experience
<Xeago>
consider 10k installs
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<berdario>
no, she's sort of a lawyer... she uses excel on windows xp... and unlike Libreoffice, excel doesn't prompt you for the separator when opening a .csv, and gets wrong the encoding (or rather, has horrible defaults), so I had to gave her proper data
<Xeago>
you don't want 1000 database connections going over cellular network
<berdario>
Vivekananda: you cloned ruby-build into .rbenv/plugins , right ?
<workmad3>
cantonic: the problem with cross-platform frameworks (and there are many of them) is that they end up with either lowest-common-denominator of features, or end up doing crappy re-implementations of things like UI features, or just do something like package up an HTML/JS setup into an app-like structure and run it through a phone browser
<workmad3>
Xeago: I don't think cantonic means a 'rails-like framework' in the sense of 'an MVC framework with an ORM'. I think he means an easy-to-use framework for doing mobile apps across multiple mobile platforms
<cantonic>
exactly. thanks workmad3
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<Xeago>
in my opinion and limited experience you are better off keeping it on the native development tools and abstracting at the data layer
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<workmad3>
Xeago: I agree, with at least some mobile development under my belt :)
<cantonic>
sorry for my bad explanation. my restricted english skills are blamable for that :P
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<Xeago>
cantonic: even then, I see Rails besides Ruby, just like I see the ADK besides Java
<Xeago>
Learn their respective frameworks and you will want the same somewhere else
<Xeago>
after a while if you ddin't get crazy of java/objC
<Xeago>
also, it absoultely SUCKS that android is stuck on Java6'ish
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<Vivekananda>
berdario: a little off the beaten track
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<havenwood>
Plenty of aliases...
<Rumsteak>
ok
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<havenwood>
Just started learning C, but I'm impressed how much you can make it look like Ruby at least in uber-trivial examples: https://gist.github.com/havenwood/5332581
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<apeiros>
havenwood: C even has blocks now…
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<Trudko>
Guys Installed rbenv then I installed passenger gem but passenger command is not in path not sure if I should do something with rbenv or I should add to path myself
<havenwood>
apeiros: Really?? C11?
<apeiros>
no idea which version. afaik apple introduced them to make stuff like grand central dispatch easier to use
<havenwood>
Trudko: Always seems like the rbenv solution is: rbenv rehash
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<Trudko>
havenwood: :D so it was in my case too :D
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<Trudko>
btw I am doing installation guid for my simnple rails installation should I set ruby my app need as global always?
<Trudko>
I mean if there some other apps using other ruby it might mess things up?!
<razieliyo>
is it okay to convert an integer to an enum?
<razieliyo>
I mean
<razieliyo>
I have a module: module X foo=1, bar=2, baz=3 end
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<havenwood>
Trudko: A convention now shared by rvm, chruby and rbenv is to put a .ruby-version file in the project dir to specify which Ruby to use.
<razieliyo>
I want to get a random value
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<havenwood>
razieliyo: [foo, bar, baz].sample
<razieliyo>
havenwood: thanks
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<razieliyo>
havenwood: I would have to change my module to an array, isn't it?
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<razieliyo>
nothing, didn't say anything, fine
<razieliyo>
I understood it
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<razieliyo>
it's weird
<razieliyo>
the sample method doesn't work in my irb
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<Vivekananda>
so hey back everyone. Ok I think I have it working now
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<Vivekananda>
So fryguy and berdario hey there
<Vivekananda>
I have it working now
<berdario>
good
<Vivekananda>
I mean till the rbevn working
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<razieliyo>
Note that in Ruby 1.8.7 it exists under the unfortunate name choice -> problem fixed =/
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<Vivekananda>
I am getting the rbevn funcationality . Now what do I install ?
<Vivekananda>
which verson ?
<Vivekananda>
I mean how do I get the options
<berdario>
latest: it's there in the topic: 2.0.0-è0
<berdario>
2.0.0-p0
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<berdario>
rbenv help install
<zastern>
I'm missing something about this code - https://gist.github.com/5332648 - probably due to being bad at math. I don't get why the loop establishes if something is prime or not prime. For example with the number 9, it should end up getting to (9-1) % 8, which = 1, which means is_prime won't get set to false. What am I misunderstanding about this?
<Vivekananda>
yep I got it rbenv intall -l
<zastern>
Bad at math AND ruby :)
<Vivekananda>
so the versions available and of interest are 2.0.0-p0 2.0.0-preview1 2.0.0-preview2 2.0.0-rc1 2.0.0-rc2 2.1.0-dev
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<Vivekananda>
what is rc1 and 2 btw berdario ?
<berdario>
release candidate
<apeiros>
release candidat
<apeiros>
+e
<Vivekananda>
and p0 is ?
<apeiros>
and you should delete 2.0.0-preview1 2.0.0-preview2 2.0.0-rc1 2.0.0-rc2
<Vivekananda>
apeiros: I remember I talked to you someplace else too but I forgot wheree :)
<berdario>
apeiros: since we're mentioning it... why does ruby have such huge patchlevel numbers?
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<apeiros>
berdario: because that's how those japanese devs roll
<Vivekananda>
I dont have those on my system. They were just the output of the rbdev install -l command
<Vivekananda>
It had a huge list but I only included the latest ones
<Vivekananda>
ok so I am looking for p0 is it ? Is it the stable one ?
<berdario>
apeiros: also, have you ever used require 'debug' ?
<Morrolan>
zastern: 8 % 8 will result in 0, and not in 1.
<berdario>
Vivekananda: yes
<apeiros>
berdario: no, why?
<Morrolan>
zastern: % returns the remainder of the division.
<berdario>
apeiros: I'm trying to find information on it
<zastern>
i do know what modulus is but...
<berdario>
but noone seems to have ever used it :(
<zastern>
its n % i, not n-1 % i
<Vivekananda>
btw where is it going to install ruby ?
<zastern>
so it does divide the 9 by 8 in the end
<zastern>
at least as I understand it?
<waxjar>
i do my debugging with puts, really
<Vivekananda>
also can I delete the ubntu install using the rbdev ?
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<berdario>
Villadelfia: ~/.rbenv/versions by default
<waxjar>
pp if i feel fancy
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<berdario>
Vivekananda: yes, you can apt-get remove rbenv... but I wouldn't remove ruby itself, unless you're really tight on space
<berdario>
waxjar: yes, you're not the first one I've heard such things from
<zastern>
So for example if we use 11 which is prime, it should do 11 / 10, return 1, as the remainder and then set not_prime = false. What am I missing?
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<Vivekananda>
berdario: o no what I meant is I have 1.8 versoin installed on the system as default via canonical. Can I remove that version via the rbenv ?
<Vivekananda>
via ubuntu canonical I mean
<Morrolan>
zastern: is_prime gets set to false if the remainder is 0.
<zastern>
I get that.
<berdario>
remove the system ruby via rbenv? no
<zastern>
But the way I'm reading it the last iteration should always have a remainder of 1, because its n / n-1
<Vivekananda>
berdario: but that is just sitting there and of no use
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<berdario>
Vivekananda: if you want to remove it, apt-get remove ruby
<Vivekananda>
I want to remove it if it is not any hassle. Also where does rbenv install the new ruby files ?
<berdario>
ops, I mentioned another guy before
<Vivekananda>
I hope that will not mess with the rbenv ruby install
<berdario>
Vivekananda: ~/.rbenv/versions by default
<Morrolan>
zastern: Correct. And since 1 != 0, the assignment inside the condition will not happen during this last iteration.
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<berdario>
Vivekananda: it shouldn't... rbenv is mostly (all?) shell scripts
<zastern>
Morrolan: right but the way im reading it, the iteration should ALWAYS end with a remainder of 1
<Morrolan>
Yes, but how does that influence the algorithm?
<zastern>
since you always end up dividing a number by itself minus one in the end. im definitely missing something
<Vivekananda>
berdario: hmm okay . Btw I keyed in rbenv install 2.0.0-p0 and it is taking a long timee to downlaod
<Vivekananda>
why is that ?
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<Vivekananda>
happenning ?
<Morrolan>
zastern: It mainly shows that this algorithm is doing more iterations than it would have to do.
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<Vivekananda>
I also want to know which directory it will install the thing in and how big the download is
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<zastern>
Morrolan: I get that, but I'm still missing something.
<berdario>
Vivekananda: don't know... I only did that once... it wasn't quick, but it wasn't terrible
<berdario>
I already told you the directory
<zastern>
It should always return 1 in the end, and never ever set is_prime to false
<zastern>
which means i must be not understanding this code
<Vivekananda>
berdario: gotcha
<Morrolan>
zastern: Well, no. In the case of "9", for example, it would iterate from 2..8. Now when it reaches '3' it'll do a 9%3, which is 0. During that iteration is_prime gets set to false.
<zastern>
Morrolan: right, but it doesnt stop iterating there does it
<zastern>
itll then go to 4
<Vivekananda>
berdario: will it also install the r1 for 2.0 and also the pry shell ?
<zastern>
oh wait but it does nothing unless it == 0
<zastern>
i get it
<berdario>
Vivekananda: uhm, I don't know if it's because of the docs, or what... but my ruby-2.0 install, seems to weigh 362MB
<zastern>
so the other iterations dont matter
<zastern>
Morrolan: I get it now, thanks!
<Morrolan>
zastern: Ah, I now see what you meant. Yep, if the condition doesn't evaluate to true, it'll simply do nothing. :)
<Morrolan>
Good to hear. :)
<berdario>
Vivekananda: yes and no... to install pry, just gem install pry after you got ruby set up
<zastern>
Morrolan: I don't math gud.
<Morrolan>
Heh, you did realise quite quickly that it's doing more work than it would have to, though. :)
<Vivekananda>
berdario: whistle !! hmm that is a a decent weight
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<Vivekananda>
hmm
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<berdario>
yes, I have an ssd... 362MB seems a bit of a waste
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<berdario>
yes, 162MB are of documentation
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<berdario>
then, 73 more MB of ri
<waxjar>
wow, didn't realise docs took that much space
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<berdario>
(and some more doc for the gems)
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<Vivekananda>
still running ......
<Vivekananda>
the download dis done now installing
<berdario>
utf8tbl_8c_source.html <-- this is huge... 2.6 alone
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<berdario>
2.6MB
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<waxjar>
hmm.. my ri folder is 6.4 MB
<berdario>
basically is the source code, dumped into an html page... and the source code is mostly a giant table for encoding conversions
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<Vivekananda>
berdario: hey there . my install failed it says --- The Ruby openssl extension was not compiled. Missing the OpenSSL lib?
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<berdario>
Vivekananda: is it running ok, but without openssl, or it failed indeed?
<berdario>
usually, when compiling you need to install the headers, from a package like libopenssl-dev
<Vivekananda>
berdario: I did nothing but do what the site told me to :(
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<berdario>
Vivekananda: apt-get install openssl-dev and try again
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<_bart>
Hi all, I'm looking at https://github.com/nateware/redis-objects and I see counters are stored at model_name:id:field_name. But how do I change that? I have a model called Identity and a model called Brand. I want to count the related posts for that identity, but that's different for every brand. So I want counters like identity:identity_id:brand_id:field_name, for example: identity:1:2:related.posts = 4 and identity:1:2:related.posts = 5
<Vivekananda>
yes am going to
<_bart>
any ideas?
<Vivekananda>
updating ubuntu first though
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<_bart>
I considered a hash on identity:id:related.posts, but that would not have the benefits of a counter dataset in Redis (no race conditions with INCR and stuff like that)
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<bitcycle>
berdario: Sweet! Thanks man.
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<bitcycle>
Hey all. Can someone advise me on where I can get help on writing c++ that creates a ruby object, passes it into a ruby script, and gets a ruby object (string) back?