<Yzguy>
maybe valid? I'm new to all the crazy consolidation stuff you can do with ruby
<Yzguy>
forgot the other " on Verde
<denom>
oh man, the recipe 'rbenv-binstubs' was binstubbing the 'make' command. that seems really strange..
<Yzguy>
@diegoviola ^^
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<diegoviola>
Yzguy: that just gives me false back
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<Yzguy>
i might have mssed up the !.nill thing
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<Yzguy>
i've used a guard clause like twice before
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<Yzguy>
yeah take out the !
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<diegoviola>
Yzguy: that won't work either
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<diegoviola>
undefined method
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<diegoviola>
Yzguy: I'll just use a if else block
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<Yzguy>
ok, it shoulda worked though.
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<rubie>
hi all: im getting unexpected behavior in the little script im writing, could someone take a look https://repl.it/B6ky
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<diegoviola>
Yzguy: maybe it's because I'm calling that helper method from my view so it has nothing to return to?
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<diegoviola>
actually
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<Yzguy>
rubie i'm taking a look
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<diegoviola>
yeah the return doesn't work there
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<rubie>
Yzguy: thanks
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<Yzguy>
rubie its happening on line 14
<Yzguy>
so somewhere in the function
<rubie>
well i mutate it on line 24
<rubie>
using #unshift
<rubie>
but once it finishes the loop i would expect the value of test_word to be reset to word
<rubie>
since we never mutate word
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<Yzguy>
right
<Yzguy>
the shift is what is causing that h to go away
<Yzguy>
im still trying to understand why
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<uberjar>
Hi. For some reason after a fresh install issuing the following command just hangs for me.. what could be the problem ? gem install bundler
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<Radar>
uberjar: how did you do the install?
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<uberjar>
Radar: well for some reason, you know how it it can be.. this just started working all of a sudden
<Radar>
uberjar: Yup.
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<uberjar>
so how about I just come back if it happens again… maybe some kind of odd network glitch
<uberjar>
chers
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<nerium>
Is there a way to list all classes in a folder?
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<Radar>
nerium: no
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<Radar>
?xy
<ruboto>
it seems like you are asking for a specific solution to a problem, instead of asking about your problem. This often leads to bad solutions and increases frustration for you and those trying to help you. More: http://meta.stackexchange.com/a/66378
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<nerium>
@Radar I
<Radar>
nerium
<nerium>
@Radar I need to access and call all classes that exists in a folder
<nerium>
I guess I can load all classes, that’s simple and then just look at all existing classes in that scope
<jhass>
we should just make a bot that we can point at some one and it will reply with why? the next five times they say something
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<nerium>
jhass: Are you refering to me?
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<jhass>
not just
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<nerium>
I’ll try to explain it a bit better then.
<nerium>
I’m building something similuar to homebrew where each class represents a lib, like ”ps”. I need to call each class in the lib folder as each lib/class encapsulates its own tests
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<nerium>
That’s why I need to list all classes in a folder
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<Yzguy>
rubie word is definitely getting changed
<rubie>
where?
<Yzguy>
not sure yet, but I'm doing some crazy "puts word = #{word}" everywhere
<Yzguy>
and it has different values during the loop
<rubie>
hah
<Radar>
nerium: example code please kthx
<Yzguy>
but nothing is directly touching the "word" variable
<Yzguy>
blowing my mind
<rubie>
unless test_word is being passed by reference
<rubie>
like test_word is just a reference to word
<baweaver>
nerium: why not just do something sane like use YML/JSON for packages and make a parser
* Radar
opens mouth to sigh, gives up entirely on everything
<nerium>
baweaver: What do you mean?
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<baweaver>
he meant your code
<baweaver>
not homecrew
<baweaver>
brew*
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<Radar>
p.s. Forumla probably defines an inherited callback
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<Radar>
This is the whole "Radar is being silent on this because there is no actual code and he doesn't want to look like an idiot suggesting a fix for a non-issue"
<nerium>
@Radar What did you expect? I not sure what code I could post that would be relevant
<nerium>
I do. I just need to list all classes in a folder. That would solve my problem.
<Radar>
I guess something like that MIGHT womrk.
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<Yzguy>
is when "word" changes to "ello"
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<nerium>
Radar: Aha, that would be even better
<rubie>
Yzguy: so it happens in the helper method?
<Yzguy>
yeah something happening in that and returning is changing word
<rubie>
Yzguy: maybe something to do with #shift
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<Yzguy>
yeah I'm thinking so
<Radar>
nerium: I missed the subclasses method, but it works for me.
<Yzguy>
its just super weird because no where does "word" explicity get reassigned
<Radar>
nerium: Anything that inherits from that Formula class will be available in subclasses, and then you'll have access to each of those subclasses that way.
<nerium>
Radar: I think I can use that. Thanks
<Radar>
np.
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<Yzguy>
rubie yeah when rearrange gets assigned the second time its ["h"], then word is ["e","l","l","o"]
<rubie>
Yzguy: maybe once we are in the while loop and test_word is assigned to word, ruby will not reach out of the while loop scope to reassign word. It will just re assign test_word to whatever test_word was in the previous iteration of the while loop
<Yzguy>
well check_word doesn't know anything about "word", its out of scope
<tejasmanohar>
like a way to programmatically interact with homebrew (on the user's system) without just executing `brew ...` commands and parsing their output with pattern matching?
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<tejasmanohar>
i see it is a ruby project but dont see a gem or anything i can plug into
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<cubicme>
hi, is there any reason that calling a lot of IO.popen {} should cause memory/resource leak? I’m caliing tiny script in my server process, and after a while it’s consuming all of the memory and I get “Cannot allocate memory”
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<S01780>
Morning. I'm trying to install a github program using RoR and bundler. Upon running install bundle in the file, it says "error, cannot find pg_conf," which is from the PostgreSQL install.
<S01780>
I installed PostGre using sudo, would that mess up the path?
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<muON>
hi, is anyone familiar with the google drive API here?
<muON>
I'm having some trouble discerning the difference between oauth2 creds and implementing service accounts
<muON>
main issue is that I can only refresh oauth once an hour and only 5 times a day, and i get auth errors if it refreshes after an hour which is inevitable
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<amincd>
Hi, if I assign the value of str to str2, then modify str2 with sub!(pattern, replacement), why does the value of str also change?
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<norc_>
The thing is you are passing objects by value.
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<norc_>
Which means you can directly modify them
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<amincd>
isn't "passing objects by value" the same as passing by reference?
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<amincd>
ah nevermind, I don't know the terminology well enough to even comment
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<norc_>
amincd: Ruby is pass by value, but the value passed is a reference.
<norc_>
Think of it that way.
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<amincd>
norc_: I see
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<amincd>
norc_: I don't understand the distinction well enough to fully grok this yet, but that helps
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<norc_>
amincd: Pass by reference would be something like void foo(int &bar) {} in c++
<amincd>
right..
<amincd>
and pass value as reference?
<norc_>
Where as void foo(int *bar) {} is pass by value (but the value is a reference)
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<norc_>
Since you are passing a pointer which really is just a memory address.
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<norc_>
Which is just a value itself.
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<norc_>
amincd: So when you pass an argument to a ruby function it creates a local variable and stores that object in there. If you assign a new object, you are just changing the content of that variable.
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<norc_>
amincd: Try to inspect the whole thing with #object_id - that should make things clearer.
<amincd>
so in ruby, assigning var1 to var2, means assigning var1's object id to var2
<amincd>
*assigning the value of var
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<norc_>
amincd: In a nutshell, yes. Remember we also have op= though, but that is just a method that happens to look the same.
<norc_>
Errr, nevermind that.
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<norc_>
op[]= I meant. :)
<norc_>
or generally assignment operator.
<amincd>
ok thanks, I think I get it. I still don't fully understand how a pass-by-reference assignment would be different, in practice, from a pass by reference-of-value assignment which happens in Ruby
<Cork>
anyone know a way to handle exitcode and stderr from Shell.new executions?
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<sami>
Hi, I'm trying to write a ruby gem. I have a class within my module for block configuration and trying to use the config, configured in what ever script/rails in another class in the same module. Anyone have any experience in that? Happy to post a couple of examples.
<ljarvis>
sami: probably lots of people, do you have a question?
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<sami>
Well, can't post examples it seems :(. This is going to be a lot harder. Sitting on a highly resctricted wifi.
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<sami>
Hmm. Where do I begin :)
<ljarvis>
the first problem, perhaps :)
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<sami>
First of, my minitests works however, I can't access the "newly set" configuration from my other class.
<ljarvis>
we're going to struggle without examples here I think
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<rikkipitt>
thanks ljarvis, that looks good!
<rikkipitt>
i'll try and adapt it to work in my case
<norc_>
[1,3,6,8] - Given a float f, I want to obtain the number from the array that is the next one in descending order. Is this doable in a compact one liner?
<Caius>
Not as short in characters, but saves building an intermediate array
<KrzaQ>
I have trouble with this code: http://melpon.org/wandbox/permlink/0KHGzPLh4nIFLaO5 When I uncomment lines 75-77 I'm getting "wrong number of arguments (1 for 0) (ArgumentError)", but the same thing above and below doesn't trigger that warning :(
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<shevy>
KrzaQ which method do you use
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<KrzaQ>
shevy: I'm not sure what you mean.
<KrzaQ>
I add methods to Calc as I read their definitions from stdin
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<KrzaQ>
calc.b is very simple, it returns some integer and it seems to work
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<shevy>
you got the error above but you did not show the full error message
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<KrzaQ>
I guess dependency graph would be a better name
<Ox0dea>
Right.
<Ox0dea>
So, what does "doesn't run" even mean?
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<KrzaQ>
https://gist.github.com/KrzaQ/c75bb3e9a8bafebc286d - if I uncomment lines 75-77 I get prog.rb:75:in `block (2 levels) in <main>': wrong number of arguments (given 1, expected 0) (ArgumentError)
<KrzaQ>
which is weird, because if they're commented, I get the desired result (line b is trivial for my input and is directly a number)
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<ij>
Why does this produce an error "child fd 8 is not redirected"? i, o = IO.pipe; IO.popen(%w{date - -}, :err => [:child, o]) { |p| }
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<Ox0dea>
KrzaQ: I realize you almost certainly aren't trying to write obfuscated code, but you've managed to do so. :P
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<Ox0dea>
You're doing this with on-the-fly methods to defer evaluation, right?
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<KrzaQ>
yeah, mostly
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<Ox0dea>
How do you mean?
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<Ox0dea>
What other "advantage" do you perceive?
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<KrzaQ>
They'll be truly function calls. I guess that's weak
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<KrzaQ>
Still, I see no reason for this not to work
<KrzaQ>
yet it doesn't
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<shevy>
foo.rb:32: warning: ARGF#lines is deprecated; use #each_line instead
<shevy>
aha, we need 'data.txt' right?
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<KrzaQ>
shevy: that's why I put it on wandbox, it was a running live example
<KrzaQ>
Added data.txt to the gist
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<KrzaQ>
hm, funny
<KrzaQ>
it seems I redefined p
<shevy>
does this take a long time
<shevy>
or does nothing happen?
<shevy>
I invoke the ruby code but it just seems to not do anything
<KrzaQ>
<0.1 second to execute/fail
<shevy>
save for the "warning: ARGF#lines is deprecated; use #each_line instead"
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<KrzaQ>
ah, I modified it to read from stdin for wandbox
<shevy>
ah
<KrzaQ>
anyhow, I found the problem
<KrzaQ>
maybe I should have used longer method names
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<shevy>
which method was it? .p() on class Calc?
<Ox0dea>
Get 'im!
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<Ox0dea>
That class is perfectly useless, by the way.
<Ox0dea>
"Classes as namespaces" is derpy as.
<KrzaQ>
shevy: yeah
<KrzaQ>
Ox0dea: I'm not a ruby proffessional :P
<KrzaQ>
I think you kinda gathered that by now
<Ox0dea>
I mean, you clearly know enough Ruby to be dangerous.
<Ox0dea>
To yourself and others.
<Ox0dea>
Look at this mess you've made for all of us.
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<Ox0dea>
KrzaQ: You can use `::Kernel.p` instead of just `p` to invoke the right method.
<Ox0dea>
You'll be better able to see what's going wrong.
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<KrzaQ>
mhm
<KrzaQ>
Ox0dea: it's toy code, so I don't have any inhibitions
<ij>
Solved my issue, :child was unneccessary.
<Ox0dea>
KrzaQ: I'm not sure I follow?
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<Ox0dea>
Giving one fuck is a fool's errand.
<KrzaQ>
it's advent of code, if something looks particularly clever or nice or fun: I'll do it, even if I would scalp myself for it in code review in a real project
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<Ox0dea>
KrzaQ: And are you having fun?
<Ox0dea>
Your code certainly doesn't look nice. Do you reckon it's clever?
<KrzaQ>
until this one I had
<Ox0dea>
Oh, right.
<Ox0dea>
Day 7 was definitely tricksy.
<Ox0dea>
And then a dead-simple Day 8. Bah humbug.
<KrzaQ>
I'll see how it looks after cleanup anyway
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<KrzaQ>
I can always redo it in a saner way
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<Ox0dea>
But zen eet vood not be a toy, ja?
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<KrzaQ>
Ja
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<adaedra>
Nein
<ij>
eet is a dutch woord for eat
<Ox0dea>
I believed you immediately because of the repeated O.
<Ox0dea>
So Dutch.
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<soulisson>
Hi, I'm new to unit testing and I have troubles understanding what a unit test is exactly, when writing a TestCase is each method a unit test?
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<Ox0dea>
soulisson: You could do much worse as first approximations go.
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<soulisson>
Ox0dea, sorry I don't understand
<Ox0dea>
soulisson: One test case per method isn't a bad way to start testing.
<Ox0dea>
A case can (and generally should) contain multiple assertions, mind.
<soulisson>
Ox0dea, so if we speak in a general manner each method defined in a TestCase class is a unit test?
<Ox0dea>
soulisson: Oh, you're hung up on the terminology? Technically, the definition of "unit test" is predicated on what constitutes a "unit" in a given project.
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<Ox0dea>
soulisson: But yeah, your intuition is pretty much correct.
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<soulisson>
Ox0dea, ok,thanks
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<Ox0dea>
soulisson: Happy to help. Any reason you went with test/unit?
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<soulisson>
Ox0dea, I read something about TDD, I thought it was nice
<Ox0dea>
soulisson: Hm? TDD is great, but test/unit is pretty spare.
<Ox0dea>
It'll certainly suffice for getting your feet wet, I suppose.
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<soulisson>
ok, I see, thanks
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<Ox0dea>
To clarify, test/unit is one of many unit testing libraries availa
<Ox0dea>
ble to you.
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<Ox0dea>
In hindsight, I suppose you could already be using Minitest, but with the old API.
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<KrzaQ>
but is it weird or is it wrong? (let's put the dynamic method creation aside)
<Ox0dea>
Oh, shit. I thought you'd got it working.
<Ox0dea>
Don't visit that link.
<adaedra>
TOO LATE
<Ox0dea>
Onoes!
<KrzaQ>
I did get that working Ox0dea
<Ox0dea>
Okay, good.
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<Ox0dea>
Then it's definitionally not wrong?
<KrzaQ>
It worked correctly for my input
<Ox0dea>
Unorthodox as hell, sure, but it makes the right figures come out.
<KrzaQ>
Trying to decipher your code now :P
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<KrzaQ>
what's the upcase for?
<[k->
DOOM
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<KrzaQ>
upcase of DOOM?
<Ox0dea>
KrzaQ: Can't have identifiers named `do`, `if`, or `in`.
<[k->
damn that hack
<KrzaQ>
ah
<Ox0dea>
KrzaQ: Don't you love it?
<Ox0dea>
Whoops. That was for [k-.
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<[k->
this is why we should have comments!
<KrzaQ>
p is pretty dangerous, if I can say so myself
<KrzaQ>
too*
<KrzaQ>
but wait
<KrzaQ>
aren't upcase names constants?
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<KrzaQ>
I guess you write to them only once, so it works
<[k->
ruby does allow you to override constants
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<[k->
there are warnings in the output
<KrzaQ>
Fair enough
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<KrzaQ>
okay
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<KrzaQ>
so you're relying on the fact that, when sorted, there are no references to yet-to-be-defined constatns
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<solars>
is vim-ruby-refactoring dead?
<KrzaQ>
and you're not taking into account that ~ will return negative result
<KrzaQ>
but overall, awesome Ox0dea
<[k->
the power of functional programming!
<Ox0dea>
KrzaQ: More technically, I'm taking advantage of the fact that the input is just the "taps" of an LFSR.
<Ox0dea>
The math for ~ works out fine regardless of integer width.
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<Ox0dea>
Not in the general case, obviously.
<KrzaQ>
it could be a problem if they made it so, same with <<
<KrzaQ>
not a big one, but you'd see -1 instead of 65535 for example :P
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<shevy>
this has now reached NASA quality!
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<Ox0dea>
That was insensitive?
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<toomus>
Hi all
<toomus>
Why this doesnt work?
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<toomus>
"+".gsub('+', '\+')
<KrzaQ>
Heh, day 8 was so simple
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<shevy>
toomus perhaps because + is special
<jhass>
>> "+".gsub('+', '\+'
<ruboto>
jhass # => /tmp/execpad-14ec7efdfcaf/source-14ec7efdfcaf:3: syntax error, unexpected keyword_rescue, expecting ...check link for more (https://eval.in/482178)
<Ox0dea>
In fact, KRI calls that argument (Caius' "\\1") `backref` internally.
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<Ox0dea>
Never mind.
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<[k->
suddenly a new ruby interpreter pops up?
<mikecmpbll>
heh
<mikecmpbll>
did you write it, [k- ?
<Ox0dea>
It's more Koichi's (and nobu's) than matz's, in my opinion.
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<[k->
i do not have much knowledge on much
<devster31>
ok, today I even went on reddit to check the solutions but they're not doing it in a substantially different way... http://dpaste.com/26VNDBY problem is 2fold, the first line is a lower number than the solution, the second errors out with a bad unicode escape
<Ox0dea>
[k-: There's wisdom in knowing that.
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<emilkarl>
How could you wrap digits in a string when a span-tag the easiest way?
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<emilkarl>
with*
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<emilkarl>
ex “15 hours 10minutes” -> “<span>15</span> hours 10<span>minutes</span>”
<BSarante>
I'm doing a program in ruby to enter a website
<jhass>
actually I see a #ruby-br, only 4 people though
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<Ox0dea>
I have some anecdata here which suggest that people who at least occasionally talk to themselves aloud do so most frequently while they are cooking for themselves. I'm in the market for corroborators.
<jhass>
not sure if it's country or language code
<jhass>
?offtopic Ox0dea :P
<ruboto>
Ox0dea, this seems to be off-topic. Please move your discussion to #ruby-offtopic, to keep this channel free for Ruby related problems. Thanks!
<Ox0dea>
I'll ask again later. ^_^
<devster31>
wow, the bot is smart
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<jhass>
wow, there's a #ruby-creative
<jhass>
do I want to know?
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<[k->
ruboto is equipped with machine learning and natural language processing abilities
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<Ox0dea>
jhass: Yep.
<jhass>
Ankhers: this is nothing something we can use locally to reproduce your issue
<jhass>
er, s/something//
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<[k->
correction: this is not* something [...]
<Ankhers>
jhass: Unfortunately I cannot really give my company's code. Which is why I was just asking about scenarios where one would work, and not the other.
<jhass>
>> class MyObject; def key; end; end; o = MyObject.new; [o.public_send(:key), o.method(:key)]
<jhass>
Ankhers: if you're not able to produce a minimal reproducing example nor share your real code and not able to solve your issue yourself, it's time to hire a consultant
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<[k->
if you do not tell us the error, we might not be able to tell the issue at all
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<[k->
error loggggg
<Ox0dea>
Symbol.new should do gensym.
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<devster31>
Ox0dea, http://dpaste.com/0MY4YAH I've tried .encode('utf-8') eval (returns an error for unicode escape) and inspect, but I can't get it to print as intended
<Ox0dea>
devster31: "As intended"?
<devster31>
the paste contains what I'd like to output
<devster31>
basically the same string I used as input
<Ox0dea>
devster31: Are you *certain* AoC gave you this string?
<devster31>
this is line 8 in my input "ckhorczuiudfjmmcc\\u\"wozqxibsfjma"
<Ox0dea>
devster31: How are you getting hold of your input?
<devster31>
copy paste, like in the paste I gave you, I copy the input, open a single quote in a repl, paste everything in, close the single quote
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<ilovelinux>
hi
<blub>
hi i love linux
<havenwood>
ilovelinux: hi
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<ilovelinux>
i have problem :(
<blub>
whats that
<ilovelinux>
:/usr/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- msf/core (LoadError)
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<ilovelinux>
this ^
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<ilovelinux>
why it return this error?
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<jhass>
?metasploit
<ruboto>
I don't know anything about metasploit
<jhass>
meh
<imperator>
I don't suppose there's a base64_encoded? method somewhere in core that i'm missing, is there?
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<jhass>
?metasploit=Please join #metasploit for help with it.
<ruboto>
I don't know anything about metasploit
<jhass>
derp
<jhass>
!fact add metasploit Please join #metasploit for help with it.
<ruboto>
jhass, I will remember that metasploit is Please join #metasploit for help with it.
<jhass>
?metasploit ilovelinux
<ruboto>
ilovelinux, Please join #metasploit for help with it.
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<ilovelinux>
uhm
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<ilovelinux>
ruboto, jhass, thank you :)
<ilovelinux>
ruboto, is a bot gh
<adaedra>
?justabot
<ruboto>
I'm just a bot. You don't need to address me.
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<shevy>
?cookie
<ruboto>
here's your cookie:
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<[k->
?rejected
<ruboto>
I don't know anything about rejected
<blub>
hi ruboto
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<diegoviola>
you have to be kidding me, sqlite is like the slowest db I ever tried
<diegoviola>
importing 3k records to it shouldn't take like 5 minutes
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<diegoviola>
with postgres it takes like 5 seconds
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<sarkis>
what version
<canton7>
get your transactions right
<canton7>
then it flies
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<diegoviola>
[diego@myhost beta360]$ time rake import_csv
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<diegoviola>
real 5m39.009s
<diegoviola>
:(
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<shevy>
diegoviola postgres is very fast and great for big data
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<shevy>
I can see it when I download the official NCBI taxonomy database ftp://ftp.ncbi.nih.gov/pub/taxonomy/taxdump.tar.gz - importing through INSERT takes much longer in sqlite than it does in postgresql
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<jhass>
?crosspost diegoviola
<ruboto>
diegoviola, Please do not crosspost without at least telling so and mentioning provided suggestions and their outcome in all channels. Experience shows that people don't do either, and not doing so is considered rude.
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<diegoviola>
sorry
<diegoviola>
with pg
<diegoviola>
[diego@myhost beta360]$ time rake import_csv
<diegoviola>
real 0m35.988s
<diegoviola>
user 0m21.837s
<diegoviola>
sys 0m1.040s
<diegoviola>
it's not much better, but still
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<shevy>
I mean the filesize of the csv originally? the NCBI taxonomy one is about 100 MB or extracted, becomes much bigger when one has it as .sql insert statements
<diegoviola>
I'm on a 5 years old computer
<diegoviola>
with 2GB of RAM
<diegoviola>
should be faster on my new thinkpad
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<ljarvis>
not much better? it went from 5 minutes to 30 seconds?
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<[k->
what is this magic doohickey rake that hides all the magic
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<solars>
does anyone know if vim ruby refactoring is dead? or are there any alternatives?
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<lacrymology>
how can I get a variable or call a method from its name, as a symbol?
<lacrymology>
(I'm not sure which one it is right now, I'll check when I know how to do it)
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<adaedra>
To call a method, you have ri:Object#public_send
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<lacrymology>
ljarvis: it's complicated, I'm using rspec and I need to access a thing that is defined in a let from an example group. That is not possible, so I'm thinking of passing a symbol (call this method to find the value for this thing). I just did it and works (it's a method, not a variable)
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<ljarvis>
wouldn't a hash do?
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<FLeiXiuS>
Is there an easy way to do a tail -f in ruby?
<jhass>
FLeiXiuS: open the file and read_nonblock from it in a loop?
<jhass>
or even just gets
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<FLeiXiuS>
jhass, Thats actually a good idea. I was going about it way wrong lol
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<hxegon>
is rspec-mocks a part of rspec by default?
<hxegon>
I'm having trouble using the allow way of stubbing.
<mg^>
ruby -e 'print ARGF.read while true' /var/log/messages
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<jhass>
ruby -ne 'print $_' or whatever it was
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<blub>
ruby -pe ''
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<mg^>
ahh I should have remembered that
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<jhass>
there should be an stdlib called l so we can -perl
<mg^>
actuale -pe doesn't work because it quits at EOF
<mg^>
I have all the typos today
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<slash_nick>
you can keep 'em
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* slash_nick
doesn't need them
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<Xentil>
hello
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<livcd>
can anyone point me to a very simple static-site generator in Ruby (something like jekyll)
<jhass>
livcd: jekyll
<jhass>
scnr
<jhass>
I like middleman
<[k->
i wanted to say that!
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<livcd>
I am looking to study the code but jekyll looks too big / complicated
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<norc>
Hi.
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<Xentil2>
hi
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<norc>
I cant figure out how to reference global variables (in particular Im interested about ruby_current_thread) using Fiddle alone. Any pointers? Ox0dea maybe?
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<ghoorst>
hi! I'm trying to encrypt and decrypt using openssl, it works, but the first few characters are scrambled, how can this be?
<apeiros>
ghoorst: you do something wrong. that's how.
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<ghoorst>
apeiros: obviously, but my thought was that if something regarding the encryption/decryption was wrong, nothing of the original text would come out right
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<hxegon>
apeiros: make a gist so we can see what you are doing
<ghoorst>
so I'm wondering where it might have gone wrong, encoding? File.open?
* apeiros
points hxegon at the backlog
<apeiros>
wrong recipient :-p
<apeiros>
ghoorst: how'd we know?
<apeiros>
ghoorst: reading your thoughts?
<ghoorst>
hxegon: one second
<hxegon>
apeiros: oops :P
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* hxegon
looks up how to make /me posts
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<apeiros>
by typing /me does stuff
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* shevy
does stuff
* apeiros
thinks hxegon already figured
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* hxegon
agrees with apeiros
<apeiros>
shevy: lies
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<jhass>
no drugs shevy!
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* hxegon
puts bong under the desk
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<apeiros>
hxegon: doesn't that make it a bit difficult?
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<Papierkorb>
hxegon: if you just want to check that #to_s is called, but not override its implementation, replace the .and_return with .and_call_original
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<hxegon>
Papierkorb: so I'm getting a new anonymous class, but not an instance of that class?
<Papierkorb>
tubbo: #digest gives you the binary representation
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<tubbo>
ugh
<tubbo>
lol
<tubbo>
was that always the case? i distinctly remember this being a lot easier like 2 years ago.
<apeiros>
anyway, the problem is trivial to solve.
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<hxegon>
maybe stubbing isn't what I think it is? I want to make a fake method so I can test #to_json...
<apeiros>
tubbo: hm, no, I think your problem stems from how you deal with the output
<Papierkorb>
hxegon: a stub: def read; end
<apeiros>
because it reads utf-8 just fine.
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<Papierkorb>
maybe there's something more fancy than that. OTOH, it won't get much more readable than good ol' def
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<hxegon>
Papierkorb: :|
<tubbo>
it is, but the fact that i had to solve it seems wrong. ruby is supposed to be utf-8 by default, all the time, everywhere...so i don't assume that i have to deal with encoding problems.
<tubbo>
because i haven't really had to in a long time!
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<tubbo>
:)
<apeiros>
tubbo: that makes no sense
<apeiros>
digest data is *binary* data
<apeiros>
you *cannot* represent it in utf-8
<Papierkorb>
hxegon: also, use expect when you *expect* it to happen (so, it must happen). use allow when you allow it to happen, and then act upon it. but it may not happen, and in that case, you don't really care either.
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<apeiros>
tubbo: did you in all seriousness embed binary as-is in a utf-8 template?
<apeiros>
because frankly, that's just insane.
<Papierkorb>
^ ahahahaha
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<tubbo>
apeiros: agreed...it's not a problem with the code, it's a problem with the docs. i wasn't aware digest() was returning binary data to me.
<tubbo>
if i cared enough i might contribute to ruby/ruby just to say "hey, if you want a String version of this, use hexdigest"
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<Papierkorb>
the docs could maybe add the word 'binary' ..
<apeiros>
um, digest returns a string just fine
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<apeiros>
s/String/printable ascii-only string/
* apeiros
prefers just using appropriate naming. .hex_digest, .binary_digest
<tubbo>
apeiros: so in your world, digest() throws a NoMethodError.
<apeiros>
it raises, but yes.
<hxegon>
Papierkorb: thanks, I don't know why I was trying to do it that way
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<tubbo>
apeiros: im not interested in discussing samantics with u
<tubbo>
disgusting* sory 4 speling
<apeiros>
tubbo: I noticed that semantics isn't up your alley
<tubbo>
br0 do u even spel
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<Papierkorb>
I feel like punching someone when s/he's using a letter as substitute for a proper word. kthxbai
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<hxegon>
u mad bruh?
<tubbo>
Papierkorb: well, i feel like punching people whenever they drop pronoun
<mg^>
If I were implementing it from scratch, I'd want to get a digest back as its own String-like object with conversion methods (.hex!, .binary!)
<mg^>
but of course that's just opinion
<tubbo>
Papierkorb: but i realize it's just because y'all aren't from God's Country
* apeiros
suggests the two of you get punching bags
<tubbo>
and you don't have pointless chain words like "a", "or", "as", "the", etc
<Papierkorb>
tubbo: instead, we've got proper health care
<tubbo>
well seeing as i'm a programmer, i also have proper health care ;)
<tubbo>
i just have to pay for it
<tubbo>
unfortunately
* hxegon
quietly puts on murica shirt and red/white/blue stunner shades
<Papierkorb>
mhenrixon_: imo too verbose
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<naftilos76>
Hi, is there a gem that lets me set a terminal's cursor position or draw certain characters with certain colors on certain x,y cursor coordinates. I am talking about text mode!!! Not graphics mode.
<hxegon>
naftilos76: isn't that curses?
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<naftilos76>
mg^, thanks looks nice
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<jhass>
naftilos76: you can some stuff with ANSI codes
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<naftilos76>
jhass, not sure how to do that. Can you pls be more specific?
<jhass>
naftilos76: google "ANSI codes ruby"
<naftilos76>
ok
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<shevy>
ncurses!
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<evlute>
hey dudes :)
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<evlute>
someone here who knows how to use the composite design pattern in ruby in a very easy example?
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<Papierkorb>
evlute: you mean compared to Java interfaces?
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<evlute>
no, compared to nothing :) just wanna learn this pattern for school :)
<evlute>
normally you have an abstract class, a leaf class and a composite class
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<Papierkorb>
evlute: You can inherit from another class. there are no per-se 'abstract' classes in ruby though.
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<mg^>
It really is about the interfacing. You make the behavior of the individual objects and the composite object meet the expectations of the things making use of those objects.
<Papierkorb>
evlute: Ruby uses mostly what we call 'duck typing'. If you have an object, which walks like a duck, and quacks like a duck, then that object *is* a duck. For this it doesn't matter if the object 'inherits' from Animal or whatever, it's a duck.
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<Papierkorb>
(If you're wondering: Yes, duck-typing is the official name)
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<adaedra>
\_o< kwak
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<evlute>
i tried this one as an example for composite - but i'm not sure if this goes into the right direction - http://nopaste.linux-dev.org/?878775
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<Papierkorb>
...
<evlute>
???
<Papierkorb>
evlute: please see attr_accessor
<evlute>
yeah i know attr_accessor to get easy access to variables :)
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<evlute>
but how to i access objects in objects in objects?
<Papierkorb>
Mh. I'm not even sure if that concept, if taken by the letter, makes sense without abstract methods
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<Papierkorb>
evlute: objects in objects? What do you mean?
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<evlute>
the composite pattern makes sense for a part of relationship where every object in the "tree" is handled equaly. so i have an atomic leaf and a composite class which could have more composite classes or one or more leafs
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<evlute>
who do i access a composite in a composite
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<mg^>
the composite is a tree structure
<mg^>
where a tree and a leaf have the same interface (both look like a duck)
<evlute>
yeah that's what i mean
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<evlute>
but how to i access the tree in the tree
<evlute>
to/do
<mg^>
well if you do it right
<mg^>
then you access it like a leaf
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<mg^>
e.g. if you have c = composite with a and b as children, you don't care if a is a composite and b is a leaf
<mg^>
what c does with them is exactly the same
<mg^>
if you implement the pattern correctly
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<evlute>
yeah in theory it is like this, but how do i implement it in ruby
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<Papierkorb>
attr_accessor :children; def initialize; @children = []; super; end
<mg^>
exactly the same as you'd implement it in any other language. If you must have some abstract class to define your interface
<mg^>
then do something like def perform; fail "implement me!"; end
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<evlute>
why attr_accessor :children?
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<mg^>
then your composite and your individual classes inherit from that, and you deal with implementing #perform for both classes
<mg^>
normally the composite would gather and compose whatever data is contained in its children
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<mg^>
or call the method that does the action, etc.
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<mg^>
For instance, if your objects are each steps in a process, and you have to gather performance times and execute composite or single steps. Well, you have perform and time_to_perform methods. The individuals do their thing and report what time it takes to do that thing, and the composite will implement them such that perform calls perform on all the children, and time_to_perform sums all of the time_to_perform of its children.
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<mg^>
then, anything expecting to use them can call perform or time_to_perform, and the underlying object, whether a single or composite, is transparent to the user.
<evlute>
i don't see the sense of this... but i have to understand it for school.... :/
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<mg^>
well, that's a start, but in order to implement the pattern, your objects have to *do* something with a well-defined interface
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<Papierkorb>
evlute: IMO it makes more sense in a language outside of ruby.
<Papierkorb>
*language other than
<evlute>
hmmm
<mg^>
that is, they have to quack the right way whether you ask A to quack or B to quack
<evlute>
hm
<mg^>
and whether the object is a single or a composite does not matter to you when you ask
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<rayzaum>
algum brasileiro para me tirar uma duvida
<rayzaum>
?
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<mg^>
if you ask your single duck or composite duck to quack, and you care about whether or not it was a single or a composite, you haven't implemented the pattern
<adaedra>
rayzaum: in English, please.
<mg^>
does that make sens?
<mg^>
sense
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<evlute>
you mean, if its a leaf or a composite - in the tree it does not matter, both will behave like a "duck" because from outside the tree it's not important if its a composite or leaf
<mg^>
exactly
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<gravspeed>
hey guys, i'm having an issue capturing the shell output of snmpget ... | grep ...
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<evlute>
i understand this mg^ but its hard for me to translate this to a programming language. maybe i should try java with interfaces
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<hxegon>
rayzaum: não há brasileiros aqui
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<evlute>
i don't know how i can modulate the qack method for the leaf and the composite
<gravspeed>
if i run it myself it returns an integer value
<Papierkorb>
evlute: No information is leaked outside of the Node (sub-)class, the user just calls #value on it and it does whatever it wants basically. Which in this case is doing a little computation
<adaedra>
hxegon: what's this about?
<hxegon>
adaedra: rayzaum asked a question in portuguese
<hxegon>
adaedra: or rather, asked if anyone spoke portuguese here
<evlute>
thank you Papierkorb - this is really interessting - study it right now
<Papierkorb>
evlute: note that there's ValueNode, which is a node which has just a value, and BinaryNode, which is binary (as in 'two'), which is basically a helper to implement Sum and Multiply
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<adaedra>
hxegon: ok
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<Papierkorb>
mg^: could you have a look, does my example match the definition? I think it does, but don't wanna teach something wrong heh ..
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<rayzaum>
ok sorry, =) thanks for answer
<mg^>
Papierkorb: It looks like a fine example to me.
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<evlute>
this looks very interessting to me :) i'm facinated
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<Papierkorb>
evlute: That concept is regularly used for "ASTs", Abstract Syntax Trees. You can use an AST to 'store' instructions the computer can then evaluate (like #value does in the example). While you don't need this concept every day, it is a really elegant solution for such problems.
<mg^>
ahh AST is a *perfect* example of a real-world use of this pattern
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<mg^>
basically anything that can be represented in BNF can be implemented this way
<evlute>
i will memorize ast for my classmates - have to introduce this pattern
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<mg^>
er, described in BNF I should say
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<Papierkorb>
evlute: if you want a challenge (note that I don't know how far you are knowledge wise, also this requires quite some time investment), you could try implementing a calculator: Have the user input a string like "4+3*2", and then calculate the correct result. The groundwork for the computational part is what I posted. The part of getting the string into that form is where a parser comes into play, for which in turn knowing BNF is really helpful
<Papierkorb>
evlute: This is an advanced topic if you're new to this, so beware.
<Papierkorb>
More like a week-end project (I'm really bad at estimating this, so maybe even more) than a "2 hour challenge"
<evlute>
i know the a little about bakus naur form - so this would be a great practise for me
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<Papierkorb>
evlute: afterwards, you can toy around with the 'parser' gem. it's a parser for ruby code. I use it for code and template instrumentation for my stuff.
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<Papierkorb>
(You could even cheat and use that gem, but then you'd learn nothing about parsers themselves :P)
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<Papierkorb>
fsck now I forgot what I was working on >_>
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<evlute>
Papierkorb: i have to thank you very much. And thanks mg^ too. Both of you put me a huge step forward.
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<Papierkorb>
Cheers!
<mg^>
No proib
<mg^>
prob
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<chadmandoo>
hey all. if i want to learn ruby on rails should I learn ruby first or dive right into ruby on rails
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<hxegon>
?rails chadmandoo
<ruboto>
chadmandoo, Please join #RubyOnRails for Rails questions. You need to be identified with NickServ, see /msg NickServ HELP
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<hxegon>
chadmandoo: but you want to get some ruby under your belt for sure
<chadmandoo>
maybe i learn simultaneously
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<hxegon>
chadmandoo: It's not impossible, but rails by itself is already a lot, and learning that without knowing ruby basics at least is going to be challenging
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<chadmandoo>
so maybe ruby first then rails
<hxegon>
chadmandoo: IMHO
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<chadmandoo>
sounds good thats what ill do. thank you
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<evlute>
Papierkorb: are you there?
<Papierkorb>
?
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<evlute>
in the class sum - why do the values left and right have value as method?
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<Papierkorb>
evlute: have a look what type left and right have
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<evlute>
thats the thing i don't see the relation to the value method. binarynode inhertis from node. but @left and @right are just variables of BinaryNode
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<Papierkorb>
evlute: what values are those two initialized to?
<evlute>
oh yes i see to ValueNode and the value method :)
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<evlute>
damn this is crazy, love it :) thank you for making me see :D
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<Papierkorb>
np
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<ramfjord>
Hey guys, I've got a question about unix pipes in ruby. I've got one process reading from one DB, and another writing to a much slower DB. They are connected by a unix pipe. I want the fast DB to be able to store as much as it could want on the file system, but the process is clearly not getting scheduled once the pipe reaches a certain size. I've found that I can emulate this behavior with the following one line snippet:
<ramfjord>
fork { rd.close; 100000.times { |i| wr.write "#{i}\n"; puts i if (i % 5000) == 0 } }
<ramfjord>
this will print out up to 10,000 on my machine, but after that will only start printing more once I call wr.read
<Papierkorb>
ramfjord: sounds like your kernel is blocking after the pipe buffer gets full
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<ramfjord>
Papierkorb: yeah, that makes sense
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<ramfjord>
hmmm, doesn't look like there's a way I can set any kind of buffer size on IO.pipe - would there likely be a way to configure this through the OS?
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<jhass>
not that will never write to disk, just use up your RAM
<jhass>
*note
<ramfjord>
that must be why it's faster. I guess I'll have to write to a file directly then...
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<jhass>
/proc/sys/fs/pipe-max-size seems to control the system wide limit, you still need a fcntl to set it for a particular instance and I doubt ruby exposes that
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<ramfjord>
right - I'll have to look more into this. I don't know why I assumed a named pipe would just page to disk if necessary, and it wouldn't matter.
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<ramfjord>
I need at least 100MB for this, which shouldn't be a problem with the available RAM, but if I IO.read it into memory at the beginning I'll have to wait for the first db read to finish before I can start writing
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<jhass>
you probably could have a thread and a StringIO, db -> stringio -> fifo -> db
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<ramfjord>
Process 1: (Thread A: DB -> StringIO), (Thread B: StringIO -> FIFO)
<jhass>
yeah
<ramfjord>
Process 2: (Thread C: FIFO -> DB2)
<ramfjord>
eh, seems like it could work
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<ramfjord>
not quite as clean as I was initially hoping, but I'll give it a go
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<ramfjord>
ahh, nice - IO::copy_stream
<jhass>
not sure that works with StringIO though
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<ramfjord>
I feel like this is going to get ugly writing to the end and reading from the front concurrently