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<dachi>
Hello everybody. I've been programming for Rails for over a half year, so I have some knowledge, we're doing a lab project with my team, but right now I'm working alone on a Ruby command line application. I have a little question, in several books or articles, which I don't remember I have seen that people put some code at the bottom of applications, I think those 2-3 words on 1 or 2 lines might include $0 or $1 maybe ARGVS as well. If i
<dachi>
you could you please guide me a little bit to it, perhaps by giving a name what that thing is all about so I can search for it?
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<flaccid>
i don't understand dachi
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<dachi>
oh okay I'm sorry. Just forget, I'll try to search for it somehow
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<dachi>
it was something like if __FILE__ == $0 but I'm not sure...
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<flaccid>
dachi: no idea what you mean. i just use methadone atm for ruby cli programs
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<dachi>
flaccid: thanks a lot, i'll check it out
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<angusigu2ss>
exit
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<waxjar>
dachi, sinatra has it in its code. i think it's something like __FILE__ == $0 yea
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<drdru>
I'm trying to install gstreamer gem for 1.8.7 (I know it's unmaintained - I don't have any choice), and the install fails with RUBY_T_HASH undeclared
<sevenseacat>
1.8.7 buddies!
<drdru>
I change RUBY_T_HASH to T_HASH and re-run ruby extconf.rb and then run make/make install
<drdru>
but glib2 never seems to get installed, despite make not having any errors
<drdru>
sevenseacat: yes, 1.8.7 :(
<drdru>
any idea how I can get glib2 to install properly?
<drdru>
I'm trying to get a piece of software running which requires 1.8.7
<drdru>
I tried 2.0.0 and I get funky errors
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<drdru>
how can I debug this error?
<drdru>
ERROR -- : undefined method `set_property' for nil:NilClass (NoMethodError)
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<drdru>
if I go to the line in question:
<drdru>
@asr.set_property(k, v)
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<__Cr0>
drdru: asr is nil..
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<JonathanNeal>
I am able to make it to level 4, where I need to store my warrior's health in a variable. I'm unsure of how to use variables in ruby. Would someone explain to me how I'm misusing a variable here? https://gist.github.com/jonathantneal/74958f05833edb4c2ff3
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<bnagy>
nfi
<bnagy>
wait, let me play
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<JonathanNeal>
bnagy: :)
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<bnagy>
ok.. I think your logic is wrong
<bnagy>
and also you're saving health in the wrong place
<ilmerovingio>
bnagy: yes i know but can you tell me if in your opinion this is related to the temple gems or not?
<bnagy>
nfi?
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<bnagy>
certainly looks like it, whatever that gem is
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<ilmerovingio>
many thanks anyway bnagy, I'm asking here before report it cause I'm new in ruby
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<sevenseacat>
if you do report it as a bug, you'll need to provide a lot more information than that.
<bnagy>
ok well try and make sure that you're reporting with your full ruby version, trim up that trace, and see if you can give them a minimal faulting program
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<iIlL10Oo>
ilmerovingio: open http://rubygems.org/ and search "temple" , you will find the gem's owner
<ilmerovingio>
iIlL10Oo many thanks
<iIlL10Oo>
ilmerovingio: :)
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<JonathanNeal>
bnagy: thanks for the help with the if statement.
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<Hanmac>
linux3.11 has an option for O_TMPFILE flag for open() should ruby use it if possible? (is it worth to make an feature request?)
<avril14th>
thx sevenseacat
<bnagy>
hanmac: imho no?
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<bnagy>
sounds super os-specific at this stage
<Hanmac>
apeiros: i was wrong yesterday, "bin"b is supported in the source, but the parser does not support it yet
<workmad3>
bnagy: well, it's a new linux kernel thing, I guess
<Hanmac>
workmad3 is right, i have seen it in the infos about what the new kernel can do
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<lxsameer>
is there any other source rather than rubygems.org to downloads gems with "gem" tool ?
<hoelzro>
lxsameer: I'm sure if you do research on running a mirror, that would explain how you could accomplish that
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<Fractional>
Hi Ruby fans!
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<lxsameer>
hoelzro: i think you misunderstand me, I want to try to download some gems from somewhere else on the net
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<hoelzro>
well, what I meant was that if you looked for information on setting up a mirror, that information would likely tell you how to configure gem to *use* that mirror
<hoelzro>
so you could apply that knowledge for your custom source
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<hoelzro>
gem help install yields the --source option
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<lxsameer>
hoelzro: i know about --source option, but i don't have any other mirror to use, that's why i asked for another mirror :)
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<hoelzro>
oh, I'm sorry
<hoelzro>
I misunderstood
<lxsameer>
hoelzro: ;)
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<Xenonucleicacid>
Hey is there anybody here who can help me set up my ruby application to run on my domain?
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<Xenonucleicacid>
I've tried doing as much reading as i could, and i honestly have no idea how to properly do it on hostgator
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<workmad3>
Xenonucleicacid: is it a rails app, by any chance?
<Xenonucleicacid>
Yes
<workmad3>
Xenonucleicacid: hostgator is not a good choice for rails apps
<Xenonucleicacid>
A bitcoin exchange i found on github, that i'd like to fool around with for a bit
<Xenonucleicacid>
I know, but hostgator is all i really have,
<workmad3>
Xenonucleicacid: at least, their shared-hosting isn't (most shared hosting is bad for rails-esque apps)
<Xenonucleicacid>
is there any way to do it?
<Xenonucleicacid>
Or am I shit out of luck
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<workmad3>
Xenonucleicacid: you could try deploying to heroku ;)
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<workmad3>
Xenonucleicacid: which is free if you're only running a single dyno
<Xenonucleicacid>
Isn't heroku just a VPS?
<workmad3>
no, heroku is a PaaS provider
<workmad3>
they provide a complete deployment platform
<Xenonucleicacid>
I have no idea how to use heroku
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<Xenonucleicacid>
id have to do even more reading about things i dont understand...
<workmad3>
Xenonucleicacid: maybe look it up? I can assure you it's easier than dealing with hostgator
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<workmad3>
you'll need to look up a lot more stuff you don't understand in order to get things working on hostgator
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<workmad3>
I've never managed to successfully get anything beyond some simple rails 1.2 apps deployed on hostgator... I'm not sure they've even got the dependencies on there for anything past rails 2
<Xenonucleicacid>
Hm alright, so i made a heroku account
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<Xenonucleicacid>
theres no fpt access or anything...
<Xenonucleicacid>
how do i upload my application?
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<workmad3>
Xenonucleicacid: you push it via git
<workmad3>
Xenonucleicacid: read the getting started guides on heroku ;)
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<stepan_>
hey guys, is anyone avail right now for about an hour of ruby tutoring? Am about to do a challenge, and would love to have someone I can bounce ideas off of. The challenge is about basic understanding
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<bnagy>
why is it time sensitive?
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<stepan_>
Hi bnagy, it's not super time sensitive, though I feel prepped enough to take the challenge now. If you're good for another time though, I would oblige :)
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<Xenonucleicacid>
it wanted me to install stuff
<Xenonucleicacid>
i installed stuff and now its not showing up
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<chase>
does anyone know of a ruby library that could be used to detect instruments in an audio track ?
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<dachi>
Hello people. I wonder what are your current thoughts about GLI gem? I'm quite new to Ruby, was working with Rails for a half year or so.. And I would appreciate couple of words about Methadon too. Thanks!
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<Hanmac>
chase … i dont think that is possible, even with the right software its very difficult, and i not know anyone (ruby or not) that can do that … it maybe only possible with midi files, but not with wav/mp3 or other ones
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<MrZYX>
hanmac: he left about a minute after his question
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<SteveBenner9>
thought I'd chime in late, @workmad3: you should check out AWS, amazon offers free services for doing tons of stuff. You can find custom-created rails server images and setup a rails app that way
<SteveBenner9>
we are using AWS for our web app during testing and its awesome.
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<workmad3>
SteveBenner9: yeah, I've used AWS
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<workmad3>
SteveBenner9: but that is just a plain VPS, you need to build a stack on top of it (or find an AMI that has most of the stuff you want and add your bits... or create your own AMI)
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<workmad3>
SteveBenner9: the original question was still on shared hosting, so I doubt building their own stack would have appealed as much as just pushing to a service ;)
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<dachi>
Please help me out. I'm trying to learn about GLI gem. I am stuck, I want to make an action without command. example: $>bundle exec bin/my_app --info... not $>bundle exec bin/my_app somecommand --info.. I don't want a command, just a flag.. anybody? tnx
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<dachi>
I askeed at stackoverflow, but nobody seems to respond.. :(
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<Fractional>
Nobody seems to respond here either
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<SteveBenner9>
@workmad3 Heh, looks like you're looking for the best of all words in hosting :) I find you either have to go with affordable preconfigured solutions with limitations or spend the extra resources to make it worth your while, and at this point I guess it is up to the logistics of whatever your team (or you0 are doing
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<SteveBenner9>
I'm just out of college in a startup so I have to build the stack myself, luckily programming is my life and ruby makes it soooo easy
<SteveBenner9>
as far as hosting, I have used Bluehost and they have nice Rails support
<SteveBenner9>
but thats the extent of my hosting epxerience.
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<SteveBenner9>
the thing I am liking about AWS is they have all the components to build a stack with, not just EC2 is free
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<workmad3>
SteveBenner9: it wasn't me looking
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<workmad3>
SteveBenner9: it was someone else trying to get a rails app up and running quickly
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<workmad3>
SteveBenner9: I personally create my own stacks and deploy them with chef onto various places (AWS, DO, my own servers)
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<SteveBenner9>
tight, no clue here as to previous conversation :)
<SteveBenner9>
yeah speaking of own servers I just got a rasperry pi going to have fun messing with that
<SteveBenner9>
i want to find out what I can do with Ruby on it
<SteveBenner9>
got a prebuilt ubuntu SD card on it
<SteveBenner9>
hook up to a UPS and build my own VPS
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<workmad3>
SteveBenner9: fun :) I've been wanting to get a raspberry pi to play with... not thinking about VPS stuff though, more about security monitors :)
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<catphish>
is $1 threadsafe, or is it actually a global variable as its dollar suggests?
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<xybre>
All $'s are global
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<catphish>
ok, thanks, there's probably better ways to do match references
* hoelzro
wonders if $1 and friends have some magic re: threads
<catphish>
xybre: says not
<xybre>
catphish: just capture the match object :)
<catphish>
yeah, i usually do that anyway
<xybre>
$1 and friends were inhereited from perl and unless they added something recently, they've been essentially just global registers
<catphish>
they're pretty nasty anyway
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<catphish>
then again, is there a way to handle this: string.gsub(/{{(.*?)}}/) do |match|
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<catphish>
and get the match groups without using $1
<catphish>
since the match isn't a match at all, but a string
<xybre>
catphish: looking at the docs it doesn't seem like it
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<catphish>
xybre: ok, in today's case, my program only has one thread, so i'll use $1
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<workmad3>
xybre: $1-$9 are oddities
<catphish>
i could always rerun the regex though if it came to it
<workmad3>
xybre: they have some weird scoping rules, they aren't just globals... but I wouldn't trust them in any sort of threads :)
<workmad3>
I barely trust them normally
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<xybre>
Hmm, well if Ruby scopes them to the block in that one case it might be safe? How to even test that?
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<xybre>
From "The Ruby Programming Language", pg 318: "it is important to remember that $~ and the variables derived from it are all thread-local and method-local."
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<catphish>
interesting, thanks
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<workmad3>
xybre: I'd probably change that in my mind to 'It is important to remember than $~ and the variables derived from it are *meant to be* thread-local and method-local' :)
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<catphish>
lol
<catphish>
it's probably easily tested
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<workmad3>
catphish: the method-local stuff is, yeah
<workmad3>
catphish: thread-safety testing is pretty hard
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<catphish>
not if you're testing something so specific
<catphish>
launch 2 threads with long sleeps, see if one can clobber the other's data
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<xybre>
" The variables $&, $‘, $’, and $1 to $9 are all derived from $~. Assigning to $~ changes the values of these derived variables. This variable is local to the current scope."
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<xybre>
Thats the line from the 1.9 version 4
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<xybre>
Version 5 drops that sentence and instead marks all variables with [thread] and [r/o] tags.
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<shevy>
these variables are so volatile
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<shevy>
and they look like any other global variables!!
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<shevy>
$1 has one thing going for it ... it's 2 chars... a matchdata object that requires [1] has at least ... x[1] 4 chars!
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<xybre>
shevy: sure, but you can't do this with $1 matchdata.tap{|m|puts m[3]}.tap{|m|puts m[1]}.tap{|m| m[2]}
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<shevy>
is UTF-16 compatible with UTF-8? as in, when I run .gsub on either of these, and .gsub on UTF-16 would return no error, would it be guaranteed to work with UTF-8 as well?
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<xybre>
shevy: it was a joke, mostly
<apeiros>
shevy: as long as you use properly encoded values, yes
<shevy>
hmm ok
<apeiros>
all characters in utf-16 can be represented in utf-8
<apeiros>
and vice-versa
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<apeiros>
the encoding in actual *bytes* differs
<apeiros>
depending on what you do it might be inefficient to work with different encodings. but that's another story.
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<wildroman>
When passing a REXML element to awesome print, it prints out only the top level element and then ".... How do I make it print the children as well?
<wildroman>
When passing a REXML element to awesome print, it prints out only the top level element and then "..." for the children. How do I make it print the children as well?
<shevy>
hmm... I dunno... somehow I always need to look it up, it just does not want to settle into my brain. I think trollop and especially slop are nicer
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<shevy>
option.separator("") # hmmm
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<vaicine>
with gsub, how do you replace with part of the pattern match? like string.gsub(/something(.*)/, $1) ?
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<shevy>
I think you can use it inside a { } given to .gsub
<shevy>
but another way would be '\\1' or something like that as second argument
<shevy>
puts x.gsub(/(.{80})/,"\\1\n")
<shevy>
x = "abc def"*1000; puts x.gsub(/(.{80})/,"\\1\n")
<shevy>
that one is better for demo
<Banistergalaxy>
Shevy still in Austria?
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<vaicine>
ty shevy
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<mcat1>
is there a channel for ruby beginners?
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<hoelzro>
mcat1: this channel is suitable for that purpose =)
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<mcat1>
awesome! I'm going thru Ruby the Hard Way and i was wondering how much experience will I need until I can contribute to an open source project? thanks
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<hoelzro>
mcat1: I would say that you can probably start helping now
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<hoelzro>
the earlier, the better
<hoelzro>
you'll learn *way* faster by doing
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<mcat1>
really?! would you *possibly* be able to point me in the direction of a project that'd be good for a nooblet?
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<mcat1>
I've had entry-level experience in other langs
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<hoelzro>
mcat1: which other languages (out of curiosity)
<hoelzro>
I'm afraid I'm not able to recommend a good Ruby OSS project =/
<hoelzro>
but stick around and some of the other regulars will be happy to oblige, I'm sure!
<mcat1>
I've done beginner courses/read beginner books on C, Python, C++, JavaScript, and (of course!) BASIC.
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<mcat1>
OK, I'll lurk on here lol
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<hoelzro>
=)
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<bluebie>
question: I have a program which reads in some files. Sometimes the files will have user errors in them, and in that situation I want to catch the errors raised, display them in the normal way, and then resume my loop and keep going to do more work - not crash out the entire program. What's the best way to quickly output an error to stderr or whatever without too much fuss? Is there a built in thing for that, or shall I reimplement the way ruby lays
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<mcat1>
Do any of you guys contribute to an open source Ruby project?
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<bluebie>
I do, a little
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<bluebie>
not so much these days (except the ones I create and am the sole contributor to..)
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<bluebie>
I wrote a bit of code and docs for camping
<waxjar>
only when i find a bug that's relatively easy to fix :/
<bluebie>
some got sucked in to rack even, but that's all been disintegrated (aka fixed) beyond recognition
<mcat1>
is there any room for me to help with Nything? I'm trying to learn the Lang...
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<bluebie>
are you any good at geometry? <_<
<mcat1>
I'm in calculus at school. so I'd say I'm familiar with geometry :)
<bluebie>
maybe you could help me a bit with my thing
<bluebie>
I'm making https://github.com/Bluebie/oozby/ - which is a little DSL language in ruby, kind of the same idea as markaby and xml builder
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<bluebie>
it creates 3d objects which you can print or cut using robots!
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<mcat1>
alright, sounds awesome! I'd love to give it a looking over, if I can contribute I definitely will!
<bluebie>
I'm actually just outputting OpenSCAD code which another program can transform in to 3d stuff, so this thing is a kind of in between language, a bit like coffeescript but not nearly as good or impressive
<bluebie>
neat!
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<bluebie>
there's two issues in the tracker: https://github.com/Bluebie/oozby/issues to do with calculating polygon shapes or polyhedra shapes as a set of 2d or 3d points, to make rectangles or rectangular prisms with rounded corners
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<bluebie>
I'm currently doing it with a bunch of boolean operations, out of primitives like "cubes" and spheres and stuff, but it's slow making the computer do all that boolean work
<lord1234>
is there a good way to strip a leading zero from a string? For example I have a YAML file with value "a : .2", when I read that file in, the .2 gets converted to 0.2 as a fixnum. I then to_s the value and want to somehow strip the leading 0 off of that, so that it says ".2" again. any suggestions?
<bluebie>
it'd be way neater I think if oozby could just output one already done
<mcat1>
bluebie okay I'll check it out after school, thanks for giving me some direction!
<bluebie>
yay ^_^
<bluebie>
I'm sure there are tonnes of other projects that would love an assist if you find yourself not so keen on my latest pet project
<bluebie>
I think there's a lot of value in finding cool gadgets, then playing with them and thinking of some way they could be cooler, then making an experimental implementation of the neat new feature or whatever
<wildroman>
hoelzro: I would expect yes, but some references on the net imply that a custom comparator is needed, which is strange
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<apeiros>
wildroman: and/or are you referring to non-ascii chars? ruby only does binary sorting
<apeiros>
so 'ä' is sorted based on 'ä'.unpack("C*")
<apeiros>
(f.ex.)
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<bluebie>
I don't know of any programming environments which default to natural sorting
<bluebie>
it is sloooooow
<Xeago>
I know osx finder does it
<wildroman>
apeiros: no, string sorting - I don't mind the integers, just the ASCII values. But it is interesting to see what happens if I get UTF input, is there a privision for that in sort?
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<Xeago>
I think UTF8 is handled by any single-byte binary sorting algorithm
<bluebie>
Many file explorer apps do it, but often they have a timeout so if it spends more than a second sorting, or there's more than a set number of files in a folder, it doesn't naturally sort, or maybe doesn't even sort at all
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<apeiros>
wildroman: no, as said, ruby only knows binary sorting
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<apeiros>
wildroman: if you want proper collations you need a gem which can deal with that
<apeiros>
bluebie: define slow. for most applications the difference won't matter
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<lord1234>
actually
<lord1234>
it was an edgecase to work around
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<lord1234>
did it with an if statement so it only runs the regex if the value is between 0 and 1
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<Xeago>
lord1234: what about -0.2?
<lord1234>
i don't have negative numbers as a use case
<lord1234>
but yes I'd have to basically account for 0, (0->1, 0>-1) and >=1
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<diogenes5>
Hi all. I have an annoyingly basic question that I've been unable to figure out with google. I'm on Windows7 and have installed Ruby with RubyInstaller2.0, but when I enter 'ruby' or 'gem' in the command line it doesn't recognise the command. Any suggestions? Sorry I'm sure there's something dumb that I've missed but I can't find it.
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<wildroman>
digifiv5e: did you restart the command shell?
<wildroman>
oops it is diogenes5
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<diogenes5>
wildroman: yep. It was already installed on a previous ocassion and I just reinstalled it, no change
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<diogenes5>
I should be able to just enter 'ruby -v' in any directory and it'll return something, right?
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<goodcodeguy>
diogenes5: I would assume you'd probably want to start with "echo $PATH"
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<goodcodeguy>
diogenes5: and make sure your paths are correct
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<goodcodeguy>
diogenes5: or "echo %path%"
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<goodcodeguy>
diogenes5: rather
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<goodcodeguy>
diogenes5: And even though these instructions are on the Java site (http://java.com/en/download/help/path.xml) you can use them to modify your paths to point to the correct binary directories for your ruby installation (provided that's how ruby works on windows--I've not installed it on a windows box before)...but that should probably get you going in the right direction
<diogenes5>
okay, I'll have a lok. thanks goodcodeguy.
<diogenes5>
look*
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<relix>
hey guys - I'm looking for the easiest way to generate a jpg that is a flat color
<relix>
i.e. just a 800x600 red jpeg
<relix>
google always seems to come up with imagemagick / rmagick which is for manipulating, I guess, but not for "generating from scratch"
<relix>
or am I wrong
<MrZYX>
imagemagick can totally do that afaik
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<hoelzro>
I've used cairo for image generation in the past
<Xeago>
correct imagemagick can do that
<hoelzro>
but that's probably overkill for this situation
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<relix>
the reason I can't just put a static jpg in is because the colour needs to be dynamic per api call
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<waxjar>
why not inherit from SubscriptionError?
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<Hanmac>
Xeago is there a reason why Subscription error and Payment error are not classes?
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<Xeago>
no idea, no
<Xeago>
this is how I've seen it done
<Xeago>
have your generic catchall error as a module
<Xeago>
and the specific ones as classes
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<Hanmac>
this inherit would be possible too: PaymentAuthorizeError < PaymentError < SubscriptionError < StandardError
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<Xeago>
don't think that reads as nice
<diogenes5>
okay I've solved the problem: It was dumb. Like an idiot, I didn't pay much attention during installation and assumed the default settings were fine, but the option for installing Ruby globally was unchecked so it would only run in a special shell. Reinstalled with that checkbox ticked and it runs globally now. Thanks for your help goodcodeguy and wildroman..
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<Xeago>
apeiros: any comment?
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<Hanmac>
Xeago i dont mean in one line
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<Xeago>
hanmac: I think it is to discourage the use of SubscriptionError directly
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<Xeago>
e.g. you can't raise SubscriptionError, "won't work"
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<Hanmac>
correction, you can, but its not nice ;P
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<Xeago>
hanmac: how would you raise a module?
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companion is now known as Companion
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<apeiros>
use the argument to get your fraction digits
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<Xeago>
apeiros: so now you are using the argument ;)
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<havenwood>
\13k: You want it set to default if Array is empty?
<apeiros>
Xeago: yes, learned that yesterday
<Xeago>
:D
<butblack>
apeiros: great
<apeiros>
butblack: write it down! :-p
<butblack>
apeiros: I'll use the iso8601(3)
<Xeago>
that might be the first thing I managed to teach you :D
<apeiros>
^^
<butblack>
apeiros: thanks again
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<Hanmac>
\13k: assign = val.empty? ? default : val
<havenwood>
\13k: assign = val.empty? || default
<apeiros>
butblack: it was Xeago yesterday who pointed out that those worked, I suggested strftime since I wasn't aware that #iso8601 can do fractionals
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<havenwood>
\13k: Listed to hanmac not me, seems like he understands what you're asking. :p
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<\13k>
hanmac: yeah, the ternary works, but kinda cumbersome in my case
<MrZYX>
activesupport/rails has a shortcut for that: foo = bar.presence | default
<MrZYX>
|| of course
<Xeago>
workmad3: I know, didn't see what he was doing
<Xeago>
only saw the ternary
<workmad3>
MrZYX: and s/presence/present? ;)
<MrZYX>
workmad3: nope
<apeiros>
workmad3: no
<Xeago>
MrZYX: single pipe, or double pipe?
<MrZYX>
double pipe, that was just a typo
<workmad3>
ah, hadn't realised what presence does
<\13k>
ah, so AS's got that. nice, I think I can use that
<workmad3>
I've only used .present? before
<syltman>
Hi noob here. I'm trying to do @var += x where both @var and x are strings and I get an error saying that + is an unkown operator any idea why?
<Hanmac>
workmad3: present? is the negate from empty? but presence is a little bi more magic
<workmad3>
hanmac: so I see :)
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<apeiros>
syltman: paste the precise exception please
<havenwood>
workmad3: "object.presence is equivalent to object.present? ? object : nil"
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<workmad3>
havenwood: yeah, figured that out now
<Hanmac>
fuc shitty apple keyboard
<\13k>
AS's #presence is exactly what I was looking for. since I already am depending on it, I can use
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<Hanmac>
syltman: @var is not set, so its nil, and nil does not have + method
<\13k>
thank you MrZYX
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<syltman>
apeiros hanmac yeah says nil:Nilclass so that's probably it.
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<syltman>
ty
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<havenwood>
Just for fun, the Rails source from #presence, #present?, #blank? squished down to one line: (array.respond_to?(:empty?) ? array.empty? : !array) ? :default : array
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<Hanmac>
havenwood: hihi they use ! and they dont know that its an method call ;P
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<havenwood>
hanmac: yeah, display works instead with the caveat of the \n missing - but it seems nice and consistent for #puts to be available - i'm just curious as to the 'why not' and if there's a good one
<jshakespear>
yep
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<Hanmac>
jshakespear: let me guess again, the error happens when you try to run "gem" ?
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<jshakespear>
hanmac: i'm using the double-bag-ftps gem
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<jshakespear>
i'm not getting it when i run "gem", but when i try to connect to the remote ftps server
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<Hanmac>
jshakespear: scroll down on the site, there is an diagnosis chapter, maybe it helps you
<crunch-choco>
can we convert html to pdf with ruby?
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<havenwood>
crunch-choco: pdf-kit looks like maybe a better choice for your case
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<jlundy>
anyone tried to extend rspec failure methods to include extra information without creating all new matchers?
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<havenwood>
RobW_: For Rails stuff #RubyOnRails is the best place.
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<havenwood>
Wish they'd name their channel simply #rails...
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<RobW_>
havenwood Just found it, thanks.
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<ismael_>
Ohay
<Hanmac>
havenwood: Rails would be the new pixar movie after Planes2 … then comes Cars Vs Planes, Cars Vs Planes 2, Cars Vs Planes Vs Rails, Cars Vs Planes Vs Rails2 etc … ;P
<agent_white>
So I'm looking for what keyword(s) to Google for... essentially, I'm trying to scrape a dynamic site, but have realized that I need to take advantage of sessions/cookies for logins before I can scrape the data.
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<agent_white>
Nevermind, answered my own question. SOP restriction
<bricker>
Is it bad to use 'force_encoding' all over the place?
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<workmad3>
bricker: yes
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<bricker>
workmad3: two follow-up questions: 1. Why? 2. What is my other option? The content is coming from an outside source, and inserting it directly into the database just replaces the UTF-8 characters with question marks.
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<workmad3>
bricker: 1. it just re-interprets the byte-stream as a different encoding. 2. the IO class you're using to read the data in with should accept an encoding parameter... use it ;)
<Hanmac>
bricker, i think the problem is that you have 3 encodings … one on the outside, one inside ruby, and one in the database …
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<workmad3>
hanmac: that's not a 'problem', that's merely a statement about how things are ;)
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<bricker>
hanmac: workmad3 going into the database it looks okay. And if I insert the character into the database via a form, it works okay.
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<bricker>
It just seems that at some point between the INSERT command, and actually committing, it converts UTF-8 to ASCII-8BIT or something
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<workmad3>
hanmac,bricker: the problem is that whatever is getting the data *into* ruby is reading it with the wrong encoding
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<bricker>
workmad3: So this is making an HTTP GET request to an API - you're saying that at that stage, I should be ensuring that the response is in UTF-8?
<workmad3>
bricker: yes
<workmad3>
bricker: assuming that it is being sent as UTF-8 anyway ;)
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<workmad3>
bricker: what are you using to make the HTTP request?
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<bricker>
workmad3: Net::HTTP (via Faraday)
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<Hanmac>
bricker, hm if you use HTTP, and if you can read the response header, there should be an "content-type" header if its correct …
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<randomdrake>
Hello there. I'm working through the Ruby Koans and I've got a question regarding creating classes. Here's what I want to do http://codepad.org/LE7clGsm however, it's not working as expected. I'm expecting roll_dice() to be ran multiple times, thus adding to the @dice_roll class member.
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<randomdrake>
But, in fact, my return of @dice_roll simply returns an empty array.
<workmad3>
randomdrake: line 19 is wrong
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<nickbender>
randomdrake: second to workmad3's comment. Try it out in irb to confirm.
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<nickbender>
randomdrake: square brackets aren't for args
<workmad3>
nickbender: I was letting him work that out for himself ;)
<workmad3>
nickbender: learning moment, etc
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<randomdrake>
Yea, I worked it out. Thanks.
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<workmad3>
randomdrake: now, can you work out why you were getting the result you did?
<randomdrake>
Been having a bit of issues adjusting to whether I use curlys, square, or parens coming from PHP and Python.
<Hanmac>
PS: rand does support range like rand(1..6)
<randomdrake>
workmad3: yea, I can move on from there :)
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<randomdrake>
hanmac: Yea, I was aware, however, I was trying anything and everything to get it to work and came across the 1 + thing in a SO response. It was late and I was frustrated so I was trying just about anything.
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<randomdrake>
nickbender: irb?
<nickbender>
randomdrake: interactive ruby.... type irb into a shell and you can play
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<randomdrake>
Oh, that's right. I remember that from another Ruby tutorial. Thanks.
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<Hanmac>
look at the three different lines, all of them are valid ruby, but each of them returns something differnent "val.push(obj)" "val.push[obj]" "val.push [obj]"
<nickbender>
extremely helpful, and you would have seen the => nil return from your push statement as an individual line
<wuest>
irb is a fantastic tool, _especially_ as you're learning.
<randomdrake>
I have to say, the Ruby Koans are quite nice. I wish there was an interactive version a la try ruby.
<Morrolan>
I believe there is.
<Morrolan>
There's an interactive version on heroku.
<nickbender>
randomdrake: Ruby Bits on codeschool/codecademy
<randomdrake>
Oh?
<Morrolan>
(Though I can not say anything about how good it is)
<Hanmac>
randomdrake: look at my three lines i posted before, and little homework for you is to how to understand why all of them work, and why they all return something different ;P
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<randomdrake>
hanmac: well val.push[obj] doesn't work because it can't convert a hash to an integer.
<randomdrake>
hanmac: but I can see how neat ruby is with all the different ways you can pass arguments in the other examples :)
<nickbender>
randomdrake: val.push obj
<nickbender>
would also work
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<nickbender>
but poetry mode can make things even more confusing
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<randomdrake>
nickbender: poetry mode?
<nickbender>
randomdrake: you don't need to use parents in 90% of the places you probably think you do, but they can enhance readability if you're used to them.
<Hanmac>
val.push[obj] works if for sample when obj is an integer (like returned from rand) because in reality its val.push()[obj]
<randomdrake>
nickbender: sure. What's the most common?
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<randomdrake>
hanmac: right.
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<randomdrake>
hanmac: or if the object has been given a way to describe itself via a to_i ?
<nickbender>
randomdrake: personal preference. In most of my orgs parens are used for method parameter declarations, and anywhere you're chaining callbacks
<randomdrake>
nickbender: what about the fact that adding an empty parens() makes it very clear you're assigning/using a function instead of a variable or something?
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<nickbender>
randomdrake: a general rule is that if it makes it easier for you to read, go ahead and put them in, but you can also avoid confusion by using verbs as your method names... sort_something is a very active name, so it's obvious it's a method
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<randomdrake>
Vim, for example, doesn't highlight function calls differently than other things so it seems like adding the parens() would make it more explicit? Or do I just need to let go of that habit/necessity a bit with Ruby?
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<Hanmac>
randomdrake: hm i dont think so … to_i is not used … there is a second method called "to_int" … (same for "to_s" vs "to_str" and "to_a" vs "to_ary" )
<nickbender>
randomdrake: get_my_documents is also obviously a method. documents therefore would be not as good a method name
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<randomdrake>
nickbender: sure. I'm just trying to wrap my head around more common/proper Ruby conventions coming from PHP or Python.
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<randomdrake>
hanmac: yea, that's what I was thinking of… to_int
<randomdrake>
hanmac: sorry, assumed it'd be similar to to_s :)
<Hanmac>
to_s means it can be turned into an string, to_str means it can be reinterpreted as a string for sample
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<workmad3>
hanmac: hmm, I thought it was more 'to_s' needs to return something 'string-like', while 'to_str' should always return a String
<randomdrake>
hanmac: yea, I looked over that. But it doesn't really talk about styling conventions.
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<Hanmac>
workmad3: hm to_s also returns a string, but to_s may lose infomation compared to_str
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<randomdrake>
nickbender, hanmac while I've got you here. One part of the koans I did sort of gloss over a bit, but that seems very powerful, is "inject". Can either of you suggest a better description of it and how it can be used than the manual?
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<EluThingolBG>
so calm
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<Hanmac>
hm inject is "do something and use result in next iteration" … very useful for sum(:+) and product(:*)
<EluThingolBG>
ha ha
<EluThingolBG>
i get it practically stress
<randomdrake>
hanmac: it seems to really only be for addition and multiplication. But, I feel like it's more powerful and that I'm missing something with that assumption.
<workmad3>
randomdrake: the other name for 'inject' is 'reduce' which is the name for it from functional programming
<EluThingolBG>
it's all bells and whistles, cause she doesn't really know if she wants to ride or drive
<workmad3>
randomdrake: and yes, it's much more powerful than that... there's an entire concurrency paradigm called 'map-reduce' (which is the building block of *everything* google does) of which 'reduce' is half of it ;)
<randomdrake>
workmad3: got a link to some more interesting examples than simply adding and subtracting then?
<Hanmac>
but imo "reduce" sounds so much "reducing" :P … imo not the right name for a function that mostly is used for sum results ;P
<EluThingolBG>
felt the pain
<randomdrake>
s/subtracting/multiplying
<EluThingolBG>
lie about shit
<workmad3>
hanmac: the name 'reduce' is because you're reducing a collection into a single item
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<EluThingolBG>
in retail selling whack guys for falling asleep in a circle
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<EluThingolBG>
50 peace is
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<randomdrake>
workmad3: I'm much more familiar with the concept of map-reduce or reduce. I think I'll go down that line of learning it then.
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<workmad3>
randomdrake: I'm sure you can get a lot of info about interesting examples if you google 'map-reduce' ;)
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<EluThingolBG>
who wrote that?
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<MrZYX>
say nothing if you're not a bot
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<MrZYX>
mkay, really just stupid. Interesting.
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<Morrolan>
I suspected so when his throughpout started to decrease. :P
<Morrolan>
s/pout/put/
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<EluThingolBG>
did it izm isn't it amusing, how only after
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<shevy>
what
<shevy>
EluThingolBG do something useful... learn ruby man
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<atmosx>
shevy: how r u mate?
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<shevy>
atmosx somewhat ok, way too much to do and no idea how to do everything
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<shevy>
atmosx in regards to programming, I will finish porting my dia-shell in this month, then finally bite the bullet and learn C
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<shevy>
atmosx oh... ruby-gnome works again for me, so I can use GUI bindings again
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<shevy>
atmosx the coolest thing would be to write GUI-agnostic
<shevy>
like ... do include Gtk... or include Qt ... or include WxWidgets
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<shevy>
and then just do ... Windows.new ... Button.new 'hello world'
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<atmosx>
shevy: never worked with GUIs. I have no idea how to do that.
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<patrikf>
shevy: that's probably not feasible because different toolkits have different ideas about how to specify layout etc.
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<patrikf>
but technically, WxWidgets tries to do that (provide a common interface for various toolkits)
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<shevy>
patrikf, yeah... I am fine with a minimal subset though
<shevy>
I dont aim to achieve perfect looks, I Just want the logic once, and have it work somehow in the different toolkits without me having to do anything else
<prophile>
.w 28
<shevy>
atmosx the basic is usually very similar
<shevy>
atmosx there are some differences though, like how Qt uses slots, and gtk does not use slots
<shevy>
atmosx it's also a bit like javascript ... signal_connect(:clicked) { # do stuff here when the mouse clicked }
<shevy>
on a widget
<atmosx>
I see
<shevy>
prophile hehe ... man, I hated how you had to use rcfiles in GTK
<shevy>
CSS is so much better than rcfiles :(
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<shevy>
but that was in gtk2 ... I have not spent much time with gtk3
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<shevy>
atmosx I mostly just want to try and do little things now. little widgets, small "apps", in ruby-gnome
<lord1234>
anyone here use YAML?
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<pontiki>
yes
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<shevy>
lord1234 some of us do, hopefully I can find a replacement for it soon, what do you wanna know about yaml
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<shevy>
YAML.load_file() # the only true way to load a yaml file
<pontiki>
a replacement for YAML? you must mean XML
<shevy>
ack
<havenn>
MessagePack.
<shevy>
XML is even worse
<pontiki>
heehee
<lord1234>
shevy: so I have shevy: YAML.load("a: 4,5,6") what do you expect a is going to equal?
<pontiki>
JSON, that's the way you do it
<shevy>
I also have to admit, I dont understand how json can be a replacement for yaml
<atmosx>
shevy: I need to migrate my app to rails and then… I really have to build 2 web apps. One for Digital Signage systems that would make my life easier and one to control openvpn nodes somehow automatically.
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<shevy>
lord1234 this looks like a string?
<atmosx>
shevy: have you seen JSON format?
<pontiki>
let's just see:
<prophile>
json can't do cycles
<lord1234>
shevy, I expected to see output of "4,5,6" but got 456
<Eiam>
(which was a bit surprising that there isn't)
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<apeiros>
IMO just as wrong as nil.to_i returning 0
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<pontiki>
i'm still surprised by that
<Eiam>
sure, I follow that too
<pontiki>
nil is nil
<apeiros>
should IMO return NaN
<Eiam>
but I'm used to nil to_i giving me 0
<pontiki>
how does it get to be zero?
<Eiam>
so if one exists
<Eiam>
the other should too =)
<Eiam>
i'd be okay with removing nil.to_i =)
<Eiam>
otherwise, add true & false .to_i!!
<apeiros>
and {}.to_i
<apeiros>
and whatnot
<pontiki>
since true and false are different classes, how do you decide which gets which?
<apeiros>
true.to_i # => 1
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<apeiros>
then you can do C style true/false conversions…
<apeiros>
0.to_b # => false
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<apeiros>
too bad that that's inconsistent with 0's truthiness
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<Eiam>
pontiki: obviously you lean on years and years and years of 0 being false
<Eiam>
and 1 being true =)
<Eiam>
decades
<pontiki>
except in shell, right?
<Eiam>
pontiki: ? fuck those guys! =)
<havenwood>
nil is 0, 0 is true, nil is false, gaaaah head explodes
<havenwood>
i'd agree with remove it or make false and true consistently bizzare
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<havenwood>
so who is doing the pull request?
<havenwood>
:P
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<shevy>
nah
<ryannielson>
I'm having a regex problem. content = "ool story bro ski" and for some reason content =~ Regexp.new("\bool\n", true) is coming back as nil, but http://rubular.com/ has it selecting the beginning of the string. What am I doing wrong. Basically I want it to match any stand alone words
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<ryannielson>
Sorry, TYPO should be: content =~ Regexp.new("\bool\b", true)
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<pontiki>
any standalone words?
<pontiki>
you have it matching ool
<apeiros>
ryannielson: "\b" == "b"
<apeiros>
that's just one thing
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<ryannielson>
aperios: Isn't \b matching a word boundary?
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<apeiros>
and *why on earth* would you write Regexp.new("\\bool\\b") instead of /\bool\b/ ?
<pontiki>
it is in PCRE...
<apeiros>
ryannielson: \b is
<apeiros>
ryannielson: but b isn't
<apeiros>
and "\b" is "b"
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<pontiki>
oh i see what's going on...
<apeiros>
because "\b" is just an escaped "b", you wanted "\\b"
<pontiki>
because of quotes instead of /
<pontiki>
or %r[]
<ryannielson>
aperios: Took it from some other code, that regex has an interpolated string in it. Just simplified it for this example.
<apeiros>
use the regex literal. less confusing.
<apeiros>
ryannielson: // can do interpolation too.
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<apeiros>
ryannielson: also my nick is apeiros. use tab-completion for heaven's sake :-p
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<apeiros>
/nick rioting-apes
<pontiki>
hee
<ryannielson>
apeiros: Oh really? Good to know. Thanks for your help everyone.
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<apeiros>
crunch-choco: well, put that money into perspective - the moment you spent 10-15 days more with a tool like prawn instead of princexml, you already paid more
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<gr33n7007h>
true
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<crunch-choco>
indeed lol
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<apeiros>
but yes, given that I can't use wkhtmltopdf for silly reasons like it not properly supporting page-breaks makes the 4k$ harder to stomach…
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<gr33n7007h>
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<platzhirsch>
I noticed, that every time I set an attribute, I also set gon.attribute_name = @attribute_name. Any idea how I could automate this in Ruby? The only thing I come up with is to use a dedicated method
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<vasilakisFiL>
is there a library in ruby like casperjs ?
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<vasilakisFiL>
I want to build a crawler
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<vasilakisFiL>
casperjs helps a lot in that.. the only thing I found was capybara but it is intented for testing
<vasilakisFiL>
thanks !
<Todd>
you can drive phantomjs via Selenium::WebDriver
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<Todd>
Mechanize is probably what you want but it doesn't execute js
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<vasilakisFiL>
hmmm yes javascript support would be great
<vasilakisFiL>
thanks :)
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<shevy>
volty yeah strange... I just wondered... because I hacked on something old here
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<shevy>
and I required it like so: require 'pdf'
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<shevy>
but then I tried to test it ... Pdf.new or Pdf.methods
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<shevy>
but I named the class PDF
<shevy>
hmmmm
<taion809>
skinkitten: sure it does, did you google for "ruby ide"?
<shevy>
skinkitten in general ruby code should be simple enough without a specific IDE
<volty>
there are some ide's, though not up to the potential of ruby // i have my own ide that is good & enough for me but would be mess for others (qtruby)
<skinkitten>
just using a text editor like sublime? shevy ?
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<volty>
shevy: try ancestors on both (PDF and Pdf) for having a speedy idea ...
<shevy>
skinkitten yeah
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<shevy>
volty right, it's no big deal... what annoyed me is that I am not being consistent in how I name my own classes
<pontiki>
since PDF is an acronym, i'd stick with all caps
<shevy>
hmmmmmmmm
<pontiki>
like you do, you know
<volty>
naaa,quite comfortabile (ide) openingn required files just with a shortct, jumping automatically to the offending error (or warning) line, integrated ri, finding method definitions etc etc is quite useful
<shevy>
pontiki, well... that has a point... we have class XML... class YAML ...
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<shevy>
if this would be consistent in all of ruby, I could go with PDF
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<shevy>
volty qtruby? did you hack that by yourself?
<shevy>
I mean the IDE you referred to
<volty>
shevy, me too, but only about methods // i'm going to change as soon as I implement some parsing on mile file (for the sake of renaming automatically)
<shevy>
cool
<pontiki>
what mean you by "consistent" ?
<shevy>
pontiki that everything would follow that rule
<pontiki>
still don't follow
<shevy>
and we'd not suddenly have... class Yaml instead
<volty>
shevy: qtruby are the ruby bindings (via smoke) for qt toolkit
<volty>
ready
<pontiki>
surely, you can't possibly mean *everthing*
<shevy>
pontiki yeah, not everything, but instead everything that runs as acronym
<shevy>
for XML and YAML this is true, I am trying to find more examples
<volty>
He's right, we should follow the established naming of acronyms
<shevy>
idea... what if we would do something like this
<volty>
(especially because one day we could not remembere if the class is our or third-parti :) )
<shevy>
class PDF; end; Pdf = PDF
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<shevy>
good or bad idea
<shevy>
volty, yeah, I have immense problems remembering things :(
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<pontiki>
i would find it confusing if both are used interchangeably
<volty>
shevy: me too, that's why I need integrated "helpers"
<pontiki>
re: Ruby IDEs: I find RubyMine the best of the bunch, but all IDEs seem too heavy handed for me
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<shevy>
pontiki what editor do you use when you write ruby code?
<pontiki>
I do use RubyMine when I want .. "mine" .. through code -- i.e., delve into gem and library sources, etc
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<pontiki>
i'm using Emacs
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<pontiki>
with Flymake and stuff
<pontiki>
but that's mainly because i imprinted on Emacs ages and ages ago
<pontiki>
i've used textmate, subl2, rubymine, and a few others
<pontiki>
but i always come back to emacs
<pontiki>
just a thing
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<volty>
what I hate about out-there ide's is their exess of attention to colorful formatting and tree-like rappresentations and much less to the keyboard, on-fly routines (like emacs) etc etc
<shevy>
yeah volty
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<shevy>
I fell in love with vim keybindings
<shevy>
then stopped using vim when I noticed it messes with my brain
<randomdrake>
?
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<randomdrake>
shevy: how does it do that?
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<shevy>
you start to think in unit operations when you use it
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<volty>
i'm stuck on wordstar keyboard shortcuts
<shevy>
:55dd50 yyP
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<shevy>
I can't burden my poor old brain with trivial things like that
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<randomdrake>
shevy: I've been using vim for years and every time I try to use something else, I end up missing being able to talk to my code like that.
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<shevy>
I use ruby to talk to text
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<pontiki>
randomdrake: that's rather what i mean by "imprinting"
<jrobeson>
i'm vimprinted
<pontiki>
you've (or i've) used the same thing for so long, the muscle memory is just hard to overcome
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<pontiki>
and then you end up looking for "how do i do this" in something else
<pontiki>
and can't find it
<jrobeson>
where are my damn keybindings :(
<pontiki>
the biggest problem for me with sublime was that the keybindings were *different* between linux and os/x
<pontiki>
and i'd be like "AAAUUUUGGGGHHHH" every few minutes
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<pontiki>
ctrl-A on os/x: beginning of line (same as emacs); ctrl-A on linux: SELECT ALL!!
<jrobeson>
ok.. so.. this already works.. but seems like there might be a shorter way than i'm missing.i'm looking to create a 8 character hex number from decimal. this is all i've gotten so far
<jrobeson>
n.to_s(16).rjust(8, '0')
<workmad3>
pontiki: that'll be because ctrl-A on linux is the equivalent of cmd-A on OS X
<volty>
but it is not only about muscle memory, i get nervous when i have much less possibilities, when i feel handicapped because i have to press down the damn key_down to get to the bottom of the screen - just an example
<pontiki>
but the point was it was different enough that it was too big of a problem
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<jrobeson>
pontiki, ah.. i suck at printfish things :(
<workmad3>
pontiki: yeah, I know, I've had to switch from mac to other keybindings at times :)