apeiros_ changed the topic of #ruby to: programming language || ruby-lang.org || Paste >3 lines of text in http://pastie.org || Rails is in #rubyonrails
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<sabooky>
if I want to add a method to array, what's the better path, subclass it or create a mixin?
<sabooky>
I only need to add one method
<banisterfiend>
sabooky: neither, just add the method directly
<sabooky>
I need to use that array type 2-3 times in my class
<sabooky>
oh, you meant modify Array itself?
<sabooky>
isn't that a bit dangerous?
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<sabooky>
this is one library amongst many for cucumber tests
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<banisterfiend>
sabooky: put it in a mixin then
<banisterfiend>
sabooky: but putting it in a mixin makes no practical difference really (unless there's conflict with another method). It just makes it easier to track where the method came from
<sabooky>
Is it normal for a user to see an Array with extended methods? (I'm fairly new to ruby)
<banisterfiend>
sabooky: what do u mean
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<sabooky>
is it normal to extend base class types like that in ruby?
<sabooky>
for someone to see a my_array.class be "Array" but for it to have extra functionality
<banisterfiend>
sabooky: it happens, but you shouldn't just do it willy nilly
<banisterfiend>
sabooky: you should only do it if you have good reason
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<ash__>
does anyone know where I might find postgresql database file in my ruby on rails folder?
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<sabooky>
banisterfiend: thanks for all your help
<havenn>
ash__: for quicker help you might want to try the #ror channel.
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<ctp>
Hi folks. A noob question :) How to fetch the host value out of ["{:host=>"101.255.17.78", :port=>"8080", :username=>nil, :password=>nil}"] ?
<havenn>
ash__: not sure I understand the question, but might want to look at config/database.yml
<samuelkadolph>
ctp: Depends on how you got that string.
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<Veejay>
the_array.first[:host] would be how but yeah depends on how you got it like samuelkadolph said
<Veejay>
Wait no
<samuelkadolph>
Veejay: It's a string in the array, not a hash
<Veejay>
Yeah
<samuelkadolph>
So the only easy way of doing it is with eval
<Veejay>
I just noticed
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<samuelkadolph>
Which would be stupid unless you built the string yourself
<Veejay>
If you built it yourself now
<Veejay>
That's kind of strange as well
<Veejay>
hah
<qnt4b>
Anybody have trouble installing 1.8.7 on Lion using rbenv? I'm getting seg faults, read about it and used gcc-4.2 to install 1.8.7 again but still get the error when trying to install gems.
<Veejay>
samuelkadolph: Maybe splitting on comma and then on => and then flattening etc.
<havenn>
If you can manage getting the hash without it being a String inside an Array >.>: {:host=>"101.255.17.78", :port=>"8080", :username=>nil, :password=>nil}[:host] #=> "101.255.17.78"
<qnt4b>
I've symlinked cc, gcc and everything to point to gcc-4.2 instead of the LLVM gcc.
<Veejay>
Also the quotes are not even escaped
<qnt4b>
gem install bundler causes a seg fault referencing timeout.rb:60
<havenn>
ash__: yeah, they are right, eval =O: eval ["{:host=>'101.255.17.78', :port=>'8080', :username=>nil, :password=>nil}"].first
<qnt4b>
So I can't install any gems using 1.8.7 on Lion.
<samuelkadolph>
ctp: Keep in mind that using eval is extremely dangerous.
<ctp>
samuelkadolph: yepp, I know :)
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<qnt4b>
1.8.7 on Lion with rbenv, anybody using it successfully? I've spent about 6 hours trying to get to the point where I can install gems, but keep getting seg faults. Like this, but this doesn't work and I'm using rbenv: http://stackoverflow.com/questions/7734344/bug-bus-error-ruby-1-8-7
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<bawer>
qnt4b: silly question: do you have to run 1.8.7?
<bawer>
what version of XCode are you running?
<Asher>
also why are you compiling 1.8.7 on lion - it comes with 1.8.7
<Asher>
presumably you have reasons 1. for wanting 1.8.7 2. for wanting other than the system provided version
<Bleehort>
Anyone familiar with the parallel-forkmanager gem?
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<Bleehort>
I can't seem to have my run_on_finish callback actually receive data...
<shadoi>
I remember trying to use it a while ago and realizing it was a mistake. :)
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<Bleehort>
I'd rather do threading and let jruby take care of it, except I have a native-compiled gem to content with as well.
<shadoi>
try rubinius?
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<Bleehort>
And I'm not up to writing a native Ruby voronoi diagram generator.
<Bleehort>
Hrm. Haven't looked at rubinius lately.
<Bleehort>
I could also try to be clever and avoid the O(n^2) algorithm, but...
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<Bleehort>
Ah, damn... only implements 1.8.7. My code relies on 1.9.3.
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<Bleehort>
(in the sense that I don't want to rewrite somethings due to being lazy)
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<banisterfiend>
Bleehort: i think many C extensions work on jruby these days
<banisterfiend>
Bleehort: so long as they dont use private c api
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<Bleehort>
Hmm. I saw warnings and stuff last time I tried... let me double check.
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<Bleehort>
Yeah, jruby 1.6.7 barfs trying to build rubyvor.
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<Bleehort>
Although, if someone can recommend something else that can do Voronoi diagrams... :)
<Bleehort>
Everything I've found relies on external C.
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<Bleehort>
The ultimate destination for my babbling: I've written code to build a 2d starmap with jumplines. Voronoi diagrams make sure that stars only link to others nearby.
<Bleehort>
perfectly fine with 50-100 stars. 3000, that's where the O(n^2) bites me.
<Bleehort>
Yeah, I could do 30-60 runs of 50-100 stars and stitch them together by hand... and there's advantages to doing that anyway... but, enh.
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<shadoi>
Bleehort: try a worker system like resque or something to make it a real batch processing system so you can spin up (n-cpus) workers and have them report the results to a DB
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<shadoi>
Or patch your gem to work on jruby :)
<Bleehort>
I'll take a look at resque... the second option is "rewrite it to not use C", and... yeah.
<shadoi>
no, like banisterfiend said, most C gems will work as long as they don't use a private API
<Bleehort>
Its not my gem, I have no clue how it works.
<banisterfiend>
shadoi: hey did u update pry yet? i'll be interested in your opinion
<shadoi>
soooo close to getting back to a major ruby project, I'll let you know in a bit
<Bleehort>
(I suppose it'd just have been easier to say 'what's the current hotness in multiprocessing?'...)
<Bleehort>
Ah well. Thanks for the help, and listening to my rambling. :)
<Blah1>
is it possible to to bundle a shell script in the bin dir of a gem (yet the shell script will still work)?
<Blah1>
the problem is a rubygems pointer for the executable shell script is created in /usr/local/bin/gemexecutable and it's a ruby wrapper so when it executes the shell script it bombs
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<Blah1>
I think i found the answer but just wanted to make sure.. there's simply no way to distribute working shell scripts in a ruby gem right?
<campanolix>
I'm seeing minitest lose track of methods in a class of a module that includes another module. I can reproduce this in a simple case, but before I post to pastie, which I am too tired for now, does anyone know of an existing bug about this?
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<antihero>
where does gem install scripts to? I gem installed stuff and I still don't have the commands :O
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<shiroginne>
morning all :)
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<provideal>
Hey folks, when using a 'case <somefancyexpression> when ... ' -- is there a builtin way to acces the case'd expression? I mean... without giving it a name by myself...
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<banisterfiend>
provideal: you mean the code for the eval(File.readlines(__FILE__)[__LINE__ - 1])
<banisterfiend>
- 2
<provideal>
:D
<provideal>
Kinda, yeah. I dislike that case a=... when... pollutes the scope
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<banisterfiend>
provideal: same with if and begin
<banisterfiend>
and while
<provideal>
yeah
<provideal>
I hoped for some strange implicit variable of the $%# kind
<banisterfiend>
provideal: i kind of like it, it means i can do
<banisterfiend>
if blah; x = 20; else; x = 30; end puts x
<banisterfiend>
witout having to put: x = nil before it
<provideal>
THAT'S neat!
<provideal>
eh
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<banisterfiend>
provideal: you could of course just go
<banisterfiend>
provideal: x = if blah; 20; else; 30; end
<provideal>
yeah, that's what I usually do
<banisterfiend>
i find that a bit weird
<provideal>
I come from more functional programming ;)
<banisterfiend>
as the if/else get indented strangely
<provideal>
that's an issue
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<Tasser>
how would I parse "1" to 1 and "" to nil?
<Holek>
I don't have access to a file, I only have access to uploaded data
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<Holek>
so I can't open it with File.open(… , 'r:bom|utf-8')
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<rippa>
encode it to binary
<Holek>
wow, that worked
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<Holek>
thanks, rippa :)
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<lolmaus>
Is it correct that when i a apply a sort_by to a hash, an array of arrays is returned?
<rippa>
yes
<lolmaus>
Ruby documentation for Array gives one parameter for `.each`. But when you apply .each to an array of arrays, you actually can use more parameters, and the second parameter will store the second value of each sub-array. I can provide an example working code.
<lolmaus>
Question: is this behavior documented somewhere?
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<rippa>
it's kind of a special case
<rippa>
normally you'd have to |(x, y)|
<apeiros_>
auto-splat
<banisterfiend>
apeiros_: how was the ruby conf
<apeiros_>
sadly, ruby does that (sadly because it makes some things ambiguous and problematic)
<apeiros_>
banisterfiend: good so far
<apeiros_>
missing power outlets
<apeiros_>
now a talk about vim… so coding time for me :-p
<lolmaus>
Okay, so when you do `.each{|x,y| ...}`, that's kinda syntactic sugar for `.each{|a| x = a[0]; y=a[1]; ...}`?
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<apeiros_>
oh, banisterfiend - are there plans to make prompt procs more powerful in pry? like getting an indicator on what's still open in multi-line? how deep we're in nested control structures?
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<banisterfiend>
lolmaus: |x,y| where the yield is yield([1, 2]) is equivalent to: x, y = [1, 2]
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<banisterfiend>
apeiros_: that information is kind of available, but not exposed in an easy way. We yield the pry itself itself to the prompt proc so u can get nearly all info about the session from that
<banisterfiend>
pry instance itself*
<lolmaus>
banisterfiend, i don't quite get it... Does Ruby use different yield for .each depending on whether you've asked for one or more parameters?
<apeiros_>
banisterfiend: how about yielding a single object instead? a small struct
<apeiros_>
would be less fragile wrt api changes
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<banisterfiend>
apeiros_: yeah we thought about just yielding the pry instance itself :P since all the info is available on that, but that's kind of confusing for people. You're probably right about yielding a struct though that's a cool idea
<banisterfiend>
apeiros_: very cool actually, can u file an issue?
<apeiros_>
so you could do .prompt = proc { |state| "#{state.line}:#{state.pry_nesting}#{state.main_object}" etc.
<apeiros_>
will do
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<banisterfiend>
yeah that's actually a nifty pattern we could use in a bunch of places
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<lolmaus>
banisterfiend, when there is one parameter, Ruby puts the whole sub-array in it, and parameter's class is Array. When there are two parameters, Ruby puts the first item of the sub-array in the first parameter, and its class could be Symbol, String, etc...
<banisterfiend>
lolmaus: block variable assigns are (almost) equiavlent to array destructurings
<lolmaus>
banisterfiend, my initial question was whether this difference in the behavior is documented.
<lolmaus>
banisterfiend, you mean that's the code universally used for block variable assignments?
<tommylommykins>
hmm, ooi, wy doesn't puts return the string that it prints?
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<lolmaus>
tommylommykins, use tap
<tommylommykins>
yeah
<tommylommykins>
tbh, I'm not too sure what use I could make with the return value of puts though :s
<banisterfiend>
lolmaus: proc { |x,(y, z), w| }.call( [1, [2, 3], 4] ) is equivalent to: x, (y, z), w = [1, [2, 3], 4 ] (as far as the assignment rules are concerned, i.e which variable gets what value from the array)
<banisterfiend>
lolmaus: so long as you think of block arguments as destructing an array you'll be fine
<banisterfiend>
though there was one edge case i forget about
<banisterfiend>
hm sorry
<banisterfiend>
.call(1, [2, 3], 4) i mean
<banisterfiend>
iirc: .call(1, 2) is more or less the same as if you'd gone .call([1, 2])
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<lolmaus>
banisterfiend, thank you, but i'm so confused that your generous explainations haven't contributed to my knowledge. :(
<banisterfiend>
lolmaus: sorry im half asleep really
<banisterfiend>
ill try again another time :)
<lolmaus>
tommylommykins, use `string_var.tap(&:display)` instead of `print string_var` to both print its value and pass on
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<lolmaus>
banisterfiend, the problem is my Ruby illiteracy, not the quality of your explainations. :)
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<lolmaus>
tommylommykins, for instance, when you've got calculations like `(1 + 2) * 3`, you can do `(1 + 2).tap(&:display) * 3` to print the intermediate result without interrupting the calculations.
<apeiros_>
I don't use ack. bbedit has awesome search.
<banisterfiend>
ah ok
<apeiros_>
but I think pry will replace a couple of patterns for me :)
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<apeiros_>
(behavioral patterns)
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<banisterfiend>
cool
<lolmaus>
Could you please recommend a hands-on introduction of Ruby TDD for newbies?
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<maasha>
Hey, is there some elegant way to iterate over a list in increments of say 12?
<apeiros_>
step
<apeiros_>
ah, hm, that's not over a list, just integer. can be used for it, though
<apeiros_>
you could use each_slice and ignore all but the first
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<maasha>
step it is
<maasha>
ty
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<withnale>
Hello. Is there a way to add an object to an array inside a hash in one line? Each time I try to write it I end up with the nil in the array if it was empty
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<rippa>
hash[key] << object
<withnale>
if they key doesn't already exist I get a NilClass error
<banisterfiend>
withnale: if it doesnt already exist then you dont have an array inside a hash
<banisterfiend>
withnale: which goes against the premise of your entire question
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<withnale>
ok. the intention is to have an array of objects associated with each key. I did mention the problem if the array is empty.
<banisterfiend>
withnale: array is empty != not no array
<banisterfiend>
rippa: or do what rippsy just said
<banisterfiend>
withnale: *
<withnale>
I don't get the Hash.new{[]}
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<artm>
join #qt
<artm>
pff
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<ksk>
hi
<ksk>
is there something like bashs -x commandline-option for ruby, to see what its doing internally? im using array.include? which does not match as expected, i guess things in the array dont look like i expect them to be..
<heldopslippers>
Hy ksk: You could just do put, p, or inspect.
<heldopslippers>
on the array
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<rking>
Hrm. I am wanting to take the output of `rake -t` and split it so that each "** Execute ____" output section becomes a separate file. Can you think of a way I could do it without parsing stdio?
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<rking>
MarcWeber: Cool man, I'll give it a shot.
<rking>
MarcWeber: Should link to vim-addon-async for convenience.
<MarcWeber>
Then vam#ActivateAddon(['vim-addon-rdebug']) is enough to make everything work ..
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<MarcWeber>
rking: There are likely to be some small updates. Just noticed that I broke something while adding breakpoint support
<ksk>
heldopslippers: if i output the array it looks fine, using inspect it looks more "array like"...
<ksk>
my question is how its value is used by .include? - a simple test works, but not with the data i want to use...
<rking>
MarcWeber: OK. I have to BBIAB anyway. Can you make the README a bit more noobish? I'm new to some of the vim-scripts stuff, and I'd benefit from the exact: "Make sure you have vim-addon-mw-utils from http://.., vim-addon-async from http://.., and VAM from http://.." -- I'd benefit and I think someone else would, too.
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<rking>
MarcWeber: You get bonus points if it's a pasteable snippet that has "git clone ..." and "ln -s" lines for the installation.
<MarcWeber>
rking: that is what VAM is about. So shut up and read its getting started guide :)
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<rking>
MarcWeber: OK, but it's still unclear exactly how to go from a stock vim with an empty ~/.vim/{autoload,ftplugin,indent,plugin}/ and get to a running vim-addon-rdebug ... does it /only/ need VAM first?
<MarcWeber>
rking: I've pushed some more notes to the github repo some minutes ago.
<MarcWeber>
Let me one bug first, please
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<heldopslippers>
ksk: ah ok!
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<MarcWeber>
rking: What's your progress in giving it a try?
<ksk>
"puts array[0].inspect" says "#<MatchData "mydata"> - do i have to match this non-data stuff using array.include? ?
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<rking>
MarcWeber: OK, I'm mostly back. First, none of the URLs around here are actual links. http://www.vim.org/scripts/script.php?script_id=4024 has the github one that you have to copy & paste, then the README there (which should probably be README.md, right?) has another github.com non-link (personally I'd make it maximally lazy and have the "git clone https://github.com/MarcWeber/vim-addon-manager.git" line) ...then VAM's README has a link with a stray ")" ...
<rking>
... at the end. Then, vim-addon-manager-getting-started.txt in the "Installation" section says "Gentoo users: skim VAM-gentoo", but you can't actually hop to that tag until you've installed.
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<MarcWeber>
rking: Right, that's because I split the help file into two parts: 1) mandatory 2) optional details you don't want to read about first
<rking>
MarcWeber: I mean, I can figure all of this out fine... I'm only trying to give feedback of where the friction is.
<MarcWeber>
rking: I know. Thinking about how to improve it.
<MarcWeber>
Its because I don't think installing VAM system wide is the best choice ..
<rking>
MarcWeber: I'm actually at that point right now. I kind of want to do the "VAM-gentoo" instructions, because I haven't used Gentoo overlays or paludis, and it sounds interesting. But I think I agree with the comment about SetupVAM, so I'll do that.
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<MarcWeber>
rking: Haven't I seen you on #nixos as well? So you're back to gentoo?
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<rking>
MarcWeber: Hrm, no #nixos for me. Now that I look at their site it does seem like something I'd be interested in. I stuck with Debian for 16 years, and am only now branching out.
<MarcWeber>
rking: go nixos.org. You can learn about layman etc - but its just a way to add ebuilds to your system which are used not often enough - thus they are not officially supported - or only supported by groups.
<MarcWeber>
Eg when I used gentoo there were java overlays and such.
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<rking>
MarcWeber: Cool. I'm learning a bunch of stuff this morning. =)
<MarcWeber>
rking: Do me a favour: goto SetupVAM sample fun, copy paste into your .vimrc and be done.
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<MarcWeber>
You can read up all the other things later ;)
<rking>
Good idea. =)
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<rking>
MarcWeber: 1) Pasted, 2) Ran vim, 3) Error detected while processing function SetupVAM..EnsureVamIsOnDisk: line 17: E154: Duplicate tag "VAM-contents" in file /home/rking/.vim/vim-addons/vim-addon -manager/doc/vim-addon-manager-getting-started.txt
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<rking>
MarcWeber: But maybe that's because I already cloned the vim-addon-manager repo and ran vim from there? Repeated invocations of vim do not cause that message.
<MarcWeber>
rking: no, its due to documentation changes
<MarcWeber>
ignore it and continue.
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<rking>
MarcWeber: E492: Not an editor command: vam#ActivateAddon(['vim-addon-rdebug'])
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<MarcWeber>
rking: compare with sample in SetupVAM
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<rking>
MarcWeber: Oh. It's ActivateAddons not ActivateAddon
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<rking>
MarcWeber: Here's my humble opinion on this. VAM should have a "quickstart" command that you can do like: curl https://github.com/.../raw/... > ~/.vim/plugin/vam.vim ; vim
<rking>
MarcWeber: It would simply put the EnsureVamIsOnDisk() and SetupVAM() in there, initially.
<MarcWeber>
rking Thanks. Copy pasting the SetupVAM is "quickstart". don't overoptimize.
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<MarcWeber>
You want to do that with your .vimrc, not with VAM.
<MarcWeber>
That's how VAM is meant to be used, yes :)
<rking>
MarcWeber: Then the rdebug README would have that line, plus also the line: call vam#ActivateAddons(['vim-addon-rdebug'])
<rking>
MarcWeber: You're being stubborn.
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<rking>
MarcWeber: So far I am having to wade through a whole lot of documentation and new concepts to get up and running.
<MarcWeber>
rking: Think about it. Its not about making 2000 plugin authors adding the same lines to 10.000 plugins. Its about learnig VAM once, understand that all youh ave to add is a name and be done.
<MarcWeber>
fixing www.vim.org is on my todo list since 2009 at least..
<rking>
Which is also a non-link, and has a comma in it so you can't even double-click it. But the instructions of how to do the quickstart should already be there.
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<MarcWeber>
You're the first user. The plugin is 24 hour old, what do you expect?
<MarcWeber>
rking: Get it up and running, then tell me whether its worth spending more time on the README file.
<rking>
OK, fair enough.
<jgame>
Hi How I can access sqlCE database with ruby?
<rking>
Back to ActivateAddons()'s result: The following scmnr keys are not known: 4024. No repository location info known for plugin vim-addon-rdebug.
<rking>
MarcWeber: So I guess that's down lower in SetupVAM()
<MarcWeber>
rking: will be fixed in a couple of days when the cron job runs again.
<MarcWeber>
ignore it.
<rking>
Oh.
<rking>
MarcWeber: I don't think any cron job is going to run.
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<MarcWeber>
rking: That bug is related to vim-addon-manager-known-repositories. If you have a look at that history you know there is a cron job.
<rking>
MarcWeber: Well, when I do "crontab -e" I get an error, so I can't imagine what VAM could be doing to create a cron job when I can't as a user.
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<MarcWeber>
rking: a cronjob not running on your machine is going to push commits to VAM-kr which will resolve the issue if you update that repo.
<jgame>
any hint to sqlCE db file
<jgame>
?
<rking>
MarcWeber: Aha! My bad. I see -- not on my machine.
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<rking>
MarcWeber: OK, at this point, it did some stuff, and now when I start up I only get that "scmnr keys" error, but I don't see vim-addon-rdebug.vim anywhere.
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<tommylommykins>
hmm
<tommylommykins>
is there any method in the standard library to recursively return all the files underneath a certain point?
<tommylommykins>
I do I have to write the recursive bit ymself?
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<Tasser>
tommylommykins, Find.find, but it's pretty stupid
<tommylommykins>
aha, thanks
* tommylommykins
notes that appears to have found a lot of things :D
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<MarcWeber>
rking: VAM installs into ~/.vim/vim-addons/ by default. Can't you just RTFM ? The SetupVAM is commented. And also the install process should tell you where plugins are put.
<rking>
MarcWeber: Why are you being irritable?
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<rking>
MarcWeber: You're sort of telling me to just do the quick way and get it started, but then you're telling me I will actually need to RTFM.
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<MarcWeber>
rking I'm telling you to read the code you're copy pasting into your .vimrc.
<MarcWeber>
And that's pretty sane to do so.
<rking>
MarcWeber: For one, that error message was definitely not something I was supposed to ignore.
<rking>
MarcWeber: Yeah, I've done that.
<MarcWeber>
So why are you asking where the .vim file is?
<rking>
MarcWeber: Look.
<rking>
MarcWeber: You told me to ignore an error that says: No repository location info known for plugin vim-addon-rdebug.
<MarcWeber>
wait
<rking>
MarcWeber: I'm thinking I should definitely not ignore that error.
<MarcWeber>
Then we missunderstood each other.
<MarcWeber>
I meant ignore the tag error.
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<rking>
< rking> Back to ActivateAddons()'s result: The following scmnr keys are not known: 4024. No repository location info known for plugin vim-addon-rdebug.
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<MarcWeber>
rking replace the name by 'github:MarcWeber/vim-addon-rdebug'. You've been right. Its realted
<rking>
Right.
<rking>
I got that now.
<rking>
And it's busy being awesome and installing a bunch of stuff.
<MarcWeber>
related. Because the cron job hasn't added the name / script-id association VAM-kr does not know about the name yet - thus no plugin.
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<rking>
MarcWeber: BTW - I'll have to read the docs on auto_install - because to me that option says "don't automatically install this", which it is doing.
<MarcWeber>
its because its set to 0 by default.
<rking>
Aha, plugin confirmation.
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<Aristata>
Does anyone here know how to change the page margins of a prawn document on a per page basis?
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<visof>
what is the best way to how start to write wm using ruby ?
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<withnale>
I've got log4r installed in the proper location, installed with gem as root, and if I type gem list log4r it comes back present but if I try ruby -e 'require "log4r";' I get a load error. Have I missed something?
<Tasser>
visof, ask unexist ;-)
<visof>
Tasser, who?
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<jedir0x>
is this a good channel to ask DataMapper questions in?
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<jedir0x>
nevermind
<jedir0x>
#datamapper
<jedir0x>
:)
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<withnale>
nvm. fixed it
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<jedir0x>
using DataMapper - how can i tell if one of my unique constraints (ie on :email) has been violated after a create(). ie: i check that valid? returns false, now i want to see if it's not valid because i've violated a unique constraint on the :email field.
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<visof>
what is the best GUI library for ruby? can i deal with windows via something like using css in web ?
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<oooPaul>
visof: I have no idea, I'm pretty much only ever doing up Rails web apps or command-line tools, neither of which require actual gui work.
<jedir0x>
"wxRuby is an open source GUI toolkit for the [Ruby] programming language. It allows native-looking desktop applications to be written for Windows, OS X, Linux GTK and other platforms using only Ruby. It's based on the cross-platform [wxWidgets] C++ GUI framework. "
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<stantona>
I'm just wondering how I can check if an object has extended a module? can I use obj.is_a?
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<rcrossan>
Not using rails, seeking direction or site that could provide me examples or documentation on basic reporting for my scripts. The most important item I need in my script is to log how long the script took and then pass/fail for items of course.
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<Aristata>
Is the
<campanolix>
I'm seeing minitest lose track of methods in a class of a module that includes another module. I can reproduce this in a simple case, but before I post to pastie, which I am too tired for now, does anyone know of an existing bug about this?
<Aristata>
weird
<Aristata>
Is there anyone here familiar with prawn?
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<coreyo>
I'm trying to create a class whose constructor can take an optional method as an argument. If no optional method is specified, a default is used. For now, I'm using the "Proc" object as the optional parameter. Is there a cleaner way of doing this?
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<Tasser>
coreyo, def initialize(arg = "foo"); ... ; end ?
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<coreyo>
Tasser yes, that is the idea
<Tasser>
coreyo, so why don't you?
<coreyo>
Tasser, I'm sorry, I think we both misunderstood each other. the arg must be a method (i.e. a function), not a string
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<coreyo>
Tasser, the function will then be stored in a state variable within the class and used later to do some calculations
<Tasser>
yes, that's a proc object.
<coreyo>
Tasser, so proc is the only way pass an external method to an object?
<Tasser>
coreyo, method(:puts)
<Tasser>
=> #<Method: Object(Kernel)#puts>
<Tasser>
... kind of.
<coreyo>
does that approach require that the method be in the class's scope?
<Tasser>
a Proc isn't that different from a Method, I'd say it's a superclass
<Tasser>
nah, a bound method takes the scope with it
<coreyo>
you mean a closure
<Tasser>
yeah, the same
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<coreyo>
The main reason that I'm asking is that, by wrapping my functions in Proc objects, I took about a 5% performance hit in the benchmark
<coreyo>
I assumed it was just an extra pointer lookup and that was it, but judging by the extra running time, I'd say something else is going on
<coreyo>
jimeh, I think the problem with that approach is that the function already has to be defined in the class
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<jimeh>
coreyo: so you're basically after an anonymous function like in javascript or erlang if I understand you correctly? :)
<umarsheikh>
i am trying to move a rails 3.1 app from 1.8.7 to 1.9.3. when i try to log in, i get the error ArgumentError (argument out of range):
<umarsheikh>
how can i fix this error?
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<Veejay>
umarsheikh: You might want to consider pasting the whole stack trace on #rubyonrails
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<umarsheikh>
Vejay, ok
<umarsheikh>
Veejay, ok
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<jimeh>
coreyo: any reason a regular block won't work for your purpose?
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<coreyo>
jimeh, Is it possible to store an anonymous function as a variable, then call that variable as a function?
<jimeh>
yes, technically that is a Proc...
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<jimeh>
but what you can also do is something like: def initialize; if block_given?; yield; else; my_default_behavior; end; end
<coreyo>
jimeh, so we go full circle. Does this mean that Proc is the only way to achieve this (or at least the cleanest and preferred way) ?
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<a_a_g>
there's lamdas as well
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<a_a_g>
which are closer to anonymous functions
<coreyo>
a_a_g, isn't a lambda just an anonymous function?
<a_a_g>
it is. procs are a bit different
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<jimeh>
basically, yes, either you pass a Proc assigned to a variable as an argument when initializing the instance, or the simplest way is probably to call it with a block
<coreyo>
basically, I need to be able to store a function like a variable, then call it later with parameters when the class needs it
<a_a_g>
proc and lambdas both will work
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<coreyo>
a_a_g, how do you assign a lambda expression to a variable?
<a_a_g>
but return behaves differently with procs and lambdas
<coreyo>
interesting, so Proc essentially calls an implicit "return" ... after returning
<coreyo>
that actually sounds very bad
<a_a_g>
eh?
<jimeh>
coreyo: To me though it seems like you should be pretty alright with something like: MyClass.new('arg') { |var1, var2| puts "custom method here" }
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<jimeh>
the block being your custom method...
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<jimeh>
or if you have a Proc assigned to a variable called `block`: MyClass.new('arg', &block)
<a_a_g>
coreyo: what do you mean by proc calls and implicit return?
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<coreyo>
a_a_g, look at jimeh's stackoverflow link
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<coreyo>
not knowing that could create a nasty bug that could be very hard to track down
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<xcyclist>
Say, pastie.org is not working for me today.
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<jimeh>
a_a_g: he means that a return call within a Proc effectively returns the enclosing scope, rather than the Proc block, while within a lambda it only returns from within the lambda block
<coreyo>
jimeh, Tasser, a_a_g thanks for the advice, I think that sufficiently answers my question
<coreyo>
^^^
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<xcyclist>
Is there a recommended pastie for this group that is working today?
<jimeh>
coreyo: as a general rule in Ruby, `return` will return the first enclosing method, for example, a return statement within a do...end block passed to #each will return the method the #each call is within, not the #each call's block itself...
<jimeh>
lambda is about the only exception to that rule I know about :)
<a_a_g>
ah ok. its not really that 'procs return from the enclosing method'. actually lambdas create a new 'stack frame'
<dbgster>
how can I delete all files in a folder that don't end with .leave , does FileUtils have anything helpful?
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<dbgster>
I then need to rename the remaing files, by removing the .leave extension.
<dbgster>
so some_file.xml.leave becomes some_file.xml
<coreyo>
jimeh, Tasser, a_a_g in fact the lambda does appear to have less overhead than the Proc
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<a_a_g>
really? that is a bit surprising
<coreyo>
still raises my running time by about 2%, but that's better than the 4 - 5% added by the block wrapping
<jimeh>
coreyo: Makes sense, I've always had the understanding that lambda's are simply simpler Procs...
<jimeh>
coreyo: I'm assuming you're using #call on the lambda right?
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<coreyo>
jimeh, yessir
<coreyo>
is there another way to do it?
<a_a_g>
is it because the proc call tries to bind the arguments intelligently?
<jimeh>
actually, with that little performance difference, I'd personally go with passing a normal do...end block when initializing the class, as it makes the code cleaner :)
<a_a_g>
i dont really see any other difference that could account for the increased overhead
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<xcyclist>
Does anyone out there use minitest?
<jimeh>
and no, I was going off on a nonsense tangent for a second when I asked about #call, sorry :)
<coreyo>
jimeh, can you give me a quick example?
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<a_a_g>
coreyo: are you taking arguments in the lambda or proc?
<coreyo>
a_a_g, yes, the function takes 5 arguments
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<jimeh>
then how about this? instance = MyClass.new { |arg| do_something(arg) }
<jimeh>
the initialize method can check if a block was passed with #block_given?, and if so call #yield, which should be loads faster than passing blocks or lambdas around...
<jimeh>
alternatively, you can define your initialize method like so: def initialize(&block)
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<jimeh>
and then do `block.call` to call the block, but that does turn it into a fully-fledged Proc and slows it down vs. just calling yield
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<coreyo>
jimeh, the link that you gave me does indeed show a huge benchmark difference, and explains the small slowdown that I have from using Proc
<coreyo>
jimeh, but when you call yield, can you actually pass parameters to it? i.e. "yield(arg1, arg2, arg3, etc.)
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<jimeh>
coreyo: yepp, that's exactly how you pass parameters to it :)
<coreyo>
jimeh, excellent, I actually think that's exactly what I want. Let me try it out.
<jimeh>
oki :)
<jimeh>
I gotta run for a train, but I'll be around again in about 4-5 hours probably :)
<coreyo>
thank you for your time jimeh, you've been most pleasant and helpful
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<jimeh>
no worries, good luck :)
<coreyo>
lol ... the ruby channel has a much different atmosphere than the css channel
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<stantona>
ruby newb here, I was wondering if some could briefly explain what this code does (class << @profile; self; end), thanks.
<LiquidInsect>
I'm afraid to ask, what happens in the css channel?
<LiquidInsect>
"Your stylesheets are bad and you should feel bad"?
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<coreyo>
LiquidInsect, almost exactly!
<LiquidInsect>
stantona: returns the eigenclass (singleton class) of @profile
<stantona>
LiquidInsect: how is that different to @profile.class?
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<LiquidInsect>
stantona: @profile.class is the class the @profile belongs to
<LiquidInsect>
but every object has an eigenclass, that belongs to that object and that object alone
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<stantona>
I see, thanks
<LiquidInsect>
you can put methods in it, and only that one object will respond to them
<slackgen>
Quick question, when I do a "string % arg" to format a string, how do I escape a % in the string?
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<slackgen>
ie- "Your score is %s%" % [100] -- should be "Your score is 100%"
<slackgen>
Nvm found the documentation in Kernel::sprintf.
<pastjean>
slackgen: in c ?
<pastjean>
slackgen: %%
<slackgen>
The solution is "Your score is %s%%" % [100]
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<slackgen>
Thanks pastjean
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<xcyclist>
slackgen: I don't usually use that. Interpolation std is usually "#{something}". irb is where you try stuff like that.
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<xcyclist>
Sorry. Scrollbar confusion.
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<slackgen>
xcyclist: Coming from a java background, I prefer this style as it is comparable to java's String.format. I'll try to start moving towards the standard-Ruby string interpolation though. Thanks.
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<xcyclist>
slackgen: What are you using for your test suite?
<slackgen>
I'm not using automated tests... This is my first ruby project. It's more proof-of-concept.
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<xcyclist>
Ok. Perhaps I need to find another group for my question.
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<OwenOu>
hi, i am getting this issue for resque's web interface, which is a rack app: NoMethodError (undefined method `process_route' for irc://chat.freenode.net:6667/#%3CResque::Server:0xdf2f780%3E)
<OwenOu>
if anyone know why, please let me know :)
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<bradsocks>
if I have a class called DummyClass, and then I do something like DummyClass("argument"), which method is being invoked?
<arturaz>
none
<oooPaul>
Nothing, you'll get an error.
<bradsocks>
I'm trying to figure out how they did it in Forgery
<bradsocks>
where you can just go
<bradsocks>
Forgery(:name).first_name
<arturaz>
bradsocks, def DummyClass
<bradsocks>
it seems like a class method of some kind
<Veejay>
This one is funny { _ => "foo" } ==> { true => "foo"}
<any-key>
_ is just whatever the last return value in irb was
<Veejay>
Ahh
<Veejay>
Totally forgot about that
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<any-key>
s'all good, it's easy to
<lectrick>
What's the gem website that lets you look at the most popular gems given a use case name?
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<qnt4b>
Any thin users around? I'm suddenly getting an error 'invalid option: --all' with 'thin start --all /etc/thin'.
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<qnt4b>
And that's what I typically use. 'thin start' works, and the version is current (1.3.1).
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<bradsocks>
shevy: nvm
<bradsocks>
i got it working
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<audy>
what do I use if I need exact Decimal arithmatic?
<audy>
There are the flt and ruby-decimal libraries. Is there anything in the standard lib?
<any-key>
What do you mean by "exact"?
<audy>
any-key: has accurate down to the last significant digit
<any-key>
so...no floats?
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<any-key>
I don't think the core language has anything of that nature
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<rippa>
core language has rational
<rippa>
and BigDecimal
<audy>
rippa: bigdecimal is just float with more bits?
<rippa>
no
<audy>
nevermind. /me reads the docs
<rippa>
well, yes
<rippa>
but it has arbitrarily many
<rippa>
and it's decimal
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<qnt4b>
I don't get it, 'thin --servers' and 'thin --only' give me the appropriate 'missing argument' error, but 'thin --all' is 'invalid option'. But these are all included in thin's runner.rb.
<lectrick>
shevy: it seems to just output a stack trace
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<shevy>
hmm
<yekta>
shevy: Just installed the rubygems1.9.1 via apt-get on Ubuntu but `ruby -v` returns "The program 'ruby' is currently not installed." But the command /var/lib/gems/1.9.0/bin/compass clean from that gem seems to work. That doens't seem normal to me.
<shevy>
yekta the problem is, debian cripples ruby
<shevy>
and puts gems things into non standard locations
<shevy>
whoa
<shevy>
yekta, you mean... you can install rubygems on ubuntu, without ruby?
<yekta>
shevy: oh? please expand...
<yekta>
shevy: I guess so... I don't have a ruby when I do `which ruby` or `ruby -v`
<shevy>
that is so gross man
<yekta>
shevy: my pythonista friend is installing it :-/
<shevy>
using gems without ruby, what were the debian apes thinking?
<coreyo>
ahh okay, it appears that if I have embedded functions that both call %Q{}, the embedded %Q doesn't process the newline characters
<shevy>
yekta, the problem is that you are stuck in the debian worldview right now
<shevy>
that means you have to deal with the shit they do :)
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<yekta>
Wouldn't something like RVM circumvent that?
<shevy>
on ruby 1.9.x source install, gem is a file that is typically in /usr/bin prefix and bundled with the source distribution
<shevy>
sure
<shevy>
the debian idiocy was one reason why RVM existed
<yekta>
hehe
<soveran>
and RVM is the reason why yet other solutions emerged :-)
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<shevy>
running different ruby versions was another reason for RVM
<shevy>
yeah
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<yekta>
OK so ruby is in /usr/bin its just not connected because of Debian
<shevy>
this is a very odd path btw /var/lib/gems/1.9.0/bin/compass
<yekta>
is it?
<shevy>
yup
<shevy>
not sure who is the first to blame
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<shevy>
debian uses /var/lib/gems for some reason
<yxhuvud>
yekta: what does 'which ruby1.9.1' give you?
<yxhuvud>
cause ubuntu has the curious thing that both 1.9.2 and 1.9.3 are packaged as 1.9.1
<Drift>
Anyone else here find Batch scripting annoying?
<yekta>
yxhuvud: yeah, there's still cruft to take care of
<shevy>
Drift, no longer. years ago I gave it up. all my batch scripting is done in ruby since then.
<td123>
Drift: you mean bash?
<td123>
or batch as in windows?
<shevy>
yekta but ruby is non critical so you could remove all of debian ruby
<Drift>
Scripts you run when starting the computer, in this case to check to see if a certain drive exists, if a certain file exists in the drive, and if not to create all these things.
<yekta>
well thanks for expounding shevy
<shevy>
then you could use RVM or compile from source
<shevy>
Drift on what OS? windows? linux?
<gogiel2>
Drift: sometimes writing a set of pipe with textutils is easier than firing ruby script
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<Drift>
Windows Batch files, .bat
<shevy>
can all be replaced with ruby scripts!
<gogiel2>
Drift: kill it with fire :O
<Drift>
I know im in the wrong channel, for that I blame search IRC.
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<shevy>
i am using linux here most of the time though
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<Drift>
you can do all that with Ruby? didnt know. I just whipped this thing together because my boss had old scripts that ran off a combination of batch and VisualBasic scripts that were a mess, confusing, and did not do a very good job at what they needed to do
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<Drift>
yeah, I got RedHat on this box, but I never use it. I kind of have anomosity towards it because it refuses not to be a pain in the ass.
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<shevy>
yeah you should be able to do all with ruby. you can interface with windows, from ruby, with that OLE module... or what was it called
<Drift>
One of these days i need to stop being a bitch and learn Linux.
<shevy>
require 'win32ole' <-- I think that is the name
<Drift>
Its a shame no one noticed the creater died. Fuck Jobs. He was a duche and yet peopled loved him for it.
<shevy>
Drift, there is no real need to use linux per se. you can use ruby on both windows and linux. the main difference I see from linux is mostly to use a shell to do tasks. but on windows this works too, like MSYS shell or even cygwin.
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<shevy>
only apple fanbois care about apple stuff
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<Drift>
Batch files fucking suck though. I am afraid to even comment them because they decided to make the REV command also an active command which can make it behave unexpectedly.
<shevy>
pity all poor souls who have to waste their lives on things like that
<Drift>
REM not REV, to comment
<Drift>
yeah, thank god its short.
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<shevy>
transition to ruby man ;)
<Drift>
the fun of using terminal services to host an ERP system. Gotta make sure all the registry values and key files exist for each new virtual user.
<shevy>
ewww
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<Drift>
using terminal services, on a virtual server, on a single-level domain.
<Drift>
I could cry
<Drift>
Im not even supposed to be able to do half of what I do on a single level domain because it breaks the fully qualified domain names.
<Drift>
but ive got scripts to fix it, that being said the authentication can be a little spotty on my sharepoint server sites
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<lectrick>
ewww, sharepoint
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<Drift>
Yeah, I found out that MS Project does authenticate like it is supposed to with sharepoint. That is annoying. It doesnt even bother to ask. (other office 2010 applications work though)
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<Drift>
and that is a pain, because you cannot open Project files from a Sharepoint Document Library from Windows Explorer.
<Drift>
Works if you open it from the Sharepoint Site though, just not Windows Explorer
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<Drift>
No one wants to acknowledge there is an issue though.
<Drift>
Fucking MS BS
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<shevy>
ewwww, microsoft
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<saml>
dirs.map{ |dir| Dir["#{dir}/**/*.js"] }.flatten I have this.. how can I exclude anything that has jquery in the path? foo/jquery/main.js bar/main.jquery.js should be excluded
<saml>
so, array has reject method and {|x| .. is like lambda
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<saml>
i shall learn ruby
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<workmad3_>
saml: that's the spirit! :)
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<shevy>
saml I think .reject is in Enumerator
<shevy>
but yeah Array includes that
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<shevy>
dunno if it is like a lambda, within the || you just give a name to the variable and the {} denotes the block
<shevy>
*Enumerable
<shevy>
why do I mix up these two :(
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<workmad3_>
shevy: they're pretty similar and pretty related
<shevy>
saml, http://ruby-doc.org/core-1.9.3/Enumerable.html on the left side you see the index of methods... .reject .each and so on (I think I have not used more than 50% of these in 5 years of ruby...)
<shevy>
lol
<shevy>
#minmax_by
<shevy>
never seen that one before
<shevy>
#none?
<shevy>
#take_while
<shevy>
EXOTIC!!!
<shevy>
#cycle
<workmad3_>
shevy: I didn't think Enumerable gave you .each... isn't that the required method to mix in Enumerable?
<shevy>
no idea
<shevy>
I am staring at other things in it
<shevy>
.cycle!!!
<shevy>
["a", "b", "c"].cycle(2) {|x| puts x } # print, a, b, c, a, b, c.
<shevy>
isn't that like .map? :\
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<shevy>
oh no wait
<workmad3_>
shevy: no, it seems to iterate twice over it
<shevy>
it cycles over the whole group
<shevy>
yeah
<shevy>
quite odd
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<oooPaul>
([:a, :b, :c] * 2).map{|x| puts x } :)
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<shevy>
hmmmm
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<oooPaul>
... although I missed what the original question was. ;)
<shevy>
and why did you use symbols? :P
<oooPaul>
One less character to type. :)
<shevy>
I accept that
<shevy>
being lazy is what drives mankind forward
<oooPaul>
For demo purposes, it's a lot easier. ;)
<shevy>
and robots
<oooPaul>
So... what was the original question that brought up the cycle() method?
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<shevy>
I first thought it is like .map
<oooPaul>
Ah.
<shevy>
but it seems to take the whole collection rather than every part of it at first like map
<oooPaul>
More like each.
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<oooPaul>
Ooo, I should use .partition() more often.
<Sudrien>
puts "01.10".to_f gives 1.1, puts "01.00".to_f gives 1.0 - is there a quick way to get rid of the .0 part, if there is nothing in the decimal place?
<shevy>
hmm
<shevy>
so your float either has 1.0 or 1.1
<shevy>
and if it is 1.0 you want to display a "1" string, otherwise if it were 1.1 you want to display "1.1" string
<xcyclist>
Say, wont_be_silent and wont_raise seem to be implied to exist in minitest, but first try I didn't see them work. Are they there?
<Sudrien>
just as an example, I know "use .to_i" isn't the answer
<shevy>
.to_i would convert to integer all the time
<oooPaul>
shevy: Internally, Ruby will "note" the first element. If the subsequent element is not greater, it doesn't change the note. Then it returns the note. :)
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<oooPaul>
So, if x.to_i and x.to_f are mathematically equivalent, the first result is returned. If they are different, by definition, x.to_f must be greater, and gets returned. ;)
<oooPaul>
That's definitely clearer, and less dependent on internal implementation. :)
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<shevy>
Sudrien, how will you use .max ?
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<oooPaul>
[1, 1.0].max => 1; [1.0, 1].max => 1.0
* oooPaul
muwuhahahahahahas.
<xcyclist>
Isn't there a method that shows the hierarchy of a class/object?
<oooPaul>
.ancestors
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<xcyclist>
Thank you.
<oooPaul>
It's not a true "hierarhcy", just a list of things it inherited/included.
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<xcyclist>
oooPaul is there one that works from an arbitrary object, or am I expected to just do obj.class.ancestors?
<oooPaul>
The latter.
<xcyclist>
'k
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<Sudrien>
(It's working) Thanks oooPaul
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<xcyclist>
Say, wont_be_silent and wont_raise seem to be implied to exist in minitest, but first try I didn't see them work. Are they there?
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<xcyclist>
NoMethodError: undefined method `must_be_silent' for #<Proc:0x00000002191d90@ProbeKitTest.rb:22 (lambda)>
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<maxamillion>
how would I inspect the methods available to an object while I'm in irb?
<oooPaul>
object.methods.sort
<oooPaul>
(the .sort is just helpful :)
<maxamillion>
oooPaul: awesome, thanks!
<oooPaul>
I use that trick *constantly*. :)
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<maxamillion>
oooPaul: its a good one, I come from a python background and I would use dir(object) quite often which appears to have a similar result/effect ... this is perfect, many thanks
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<oooPaul>
I did Python back in the day. I tried doing it again about a year ago and found that Ruby had *totally* spoiled me. :)
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<maxamillion>
there are things I'm finding from both languages that I really like and as always with everything ... there are some that I don't, but so far my time with ruby has been positive
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<jergason>
maxamillion: you should look at pry too
<jergason>
like a better irb
<jergason>
you can do `ls some_object` and it will show all instance vars and methods
<jergason>
tons of other neat stuff
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<maxamillion>
jergason: ah, cool ... I'll have to check that out
<maxamillion>
jergason: thanks! :)
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<jergason>
np
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<robdodson>
if anyone has a moment, i'm trying to get a unit test to run following the pickaxe book, here's the test: http://pastie.org/3819133 … when I just do ruby test_roman.rb nothing is output. any ideas?
<friskd>
When you guys run your deploy process, if you have javascript that gets build and compiled, do you typically include the compiled js in your git repo, or do you build the production js as a part of the deploy process
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<robdodson>
do i need to call my test case with a flag from the CLI to get it to run the tests?
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<oooPaul>
friskd: I don't do anything special, so it gets compiled on the servers.
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<oooPaul>
robdodson: CLI -- you mean your console command line, or from within IRB or something?
<robdodson>
from the console. terminal in my case
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<robdodson>
if i do "ruby test_roman.rb" it just gives me the prompt again
<xcyclist>
NoMethodError: undefined method `must_be_silent' for #<Proc:0x00000002191d90@ProbeKitTest.rb:22 (lambda)>
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<robdodson>
i mean, i have rails gems installed but i'm not in a rails app or anything
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<robdodson>
just a class and a test case in a folder
<xcyclist>
Hey, oooPaul. Can you answer my question about must_be_silent?
<oooPaul>
When I run individual tests in a Rails environment, I always run them from the Rails root dir, since that seems to make the paths all work better.
<xcyclist>
I'm using this the same way I use other minitest methods, but it just fails.
<oooPaul>
xcyclist: Maybe -- what was the question? :)
* oooPaul
isn't familiar with minitest.
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<xcyclist>
I have this failure:
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<xcyclist>
NoMethodError: undefined method `must_be_silent' for #<Proc:0x00000002191d90@ProbeKitTest.rb:22 (lambda)>
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<oooPaul>
Sounds like you're missing a require, maybe... ?
<Squarepy>
add expiration to a standard ticket object
<thams_>
But then, when asking for "expiration" for a ticket object that doesn't expire… what do you get back?
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<Squarepy>
indeed
<thams_>
I.e., the client of such an object would reasonably expect that "expiration" would give a meaningful answer to any Ticket it was sent to.
<thams_>
And in some cases, it can not.
<thams_>
(BTW… I looked around for an OO design room and didn't find one)
<Squarepy>
in general that is a problem, not for this example let's say, set default expiration date to inf
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<shevy>
jedir0x but perl, ruby are lightweight languages compared to D
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<jedir0x>
shevy: yeah, i was just messing around
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<Diranged>
hey.. im pretty new to ruby but i need a bit of help. i have a script thats going to potentially run hundreds or thuosands of times every hour. the script is going to go to a remote data source and get some data, and return it. however, i want to cache that data locally — not for performance reasons, but in case that remote data source is unavailable..
<Diranged>
i was thinking i'd open a text file, and do a yaml dump to the file … but then i thought about the prospects of opening and closing the file all the time, and the one script overwriting changes from another script .. bla bla bla ..
<Diranged>
im wondering if theres a smarter way to do this in ruby .. something that deals with file locking…
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<troulouliou_dev>
hi what is the best thing to say i wan to slice from the the 4 byte up to the end
<troulouliou_dev>
in a string
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<Diranged>
any thoughts on the best way to handle caching this data to a local tmp file?
<Veejay>
troulouliou_dev: Look up each_byte and .to_a
<troulouliou_dev>
Veejay, ok thanks
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<shevy>
Diranged tell you what
<shevy>
if you have not yet tried the yaml approach, go and use it first
<shevy>
you can also check if the file is being modified/opened right now
<shevy>
in that case you could simply write a new yaml dump
<shevy>
and have your script always check in the latest new yaml file
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<shevy>
if that is not enough, you can easily change that class lateron
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<Diranged>
hmm
<Diranged>
right now im looking at FileCache as a potential solution..
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<Kovensky>
hmm
<Kovensky>
is there a way to have an unsigned number in ruby?
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<Kovensky>
more specifically, I want to do an unsigned complement
<Kovensky>
(I have a 32-bit CRC, want to invert every bit there)
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<Kovensky>
I instead get a negative number + 1 :S
<apeiros_>
& 0xffffffff
<Kovensky>
oh
<Kovensky>
you mean ^ btw
<apeiros_>
no
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<apeiros_>
I mean &
<Kovensky>
(~crc)&0xffffffff will do what I want
<Kovensky>
but so will crc^0xffffffff
<Kovensky>
as long as it's a Bignum instead of a Fixnum ._.
<apeiros_>
you still have a 32bit ruby? o0
<Kovensky>
cygwin
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<Squarepy>
it is hard to get at the way an integer is stored
<Kovensky>
a890feb4 (576f014b) <-- seems correct
* apeiros_
fails to make the connection between cygwin & 32bit ruby - cygwin is only capable of running 32bit apps?
<Kovensky>
could be because a890feb4 is already a Bignum though
<Kovensky>
apeiros_: if it's linked against cygwin1.dll, yes
<Kovensky>
there has been talks in cygwin's development ML about a 64bit version though
<Kovensky>
ave*
<Kovensky>
have**
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<boom>
I have a block, that is iterating through an array, if the variable (let's call it "e") created by the block what does !e mean?
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<Veejay>
Most of the time it means not e
<Veejay>
What is the array made of?
<boom>
just a bunch of words
<Veejay>
Strings?
<boom>
that's what I thought too
<boom>
yes
<Veejay>
Well that's peculiar
<Kovensky>
apeiros_: cygwin can run non-32bit apps, but they have to be linked against mingw or msvcrt and thus those apps have no knowledge of the cygwin environment
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<Veejay>
Kovensky: Out of curiosity, do you develop on Windows because you want to?
<Veejay>
Honest question
<shevy>
lol
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<Kovensky>
lol
<Kovensky>
easy access to games :D
<boom>
just install a virtual server
<shevy>
this will eat the time of your life man
<LiquidInsect>
virtualbox + linux would be better than cygwin
<boom>
it's easy
<Kovensky>
more seriously, because my OSX is broken and other unixes are misbehaving with my GPU :(
<boom>
yeah exactly
<Veejay>
shevy: I'm curious man, Windows is such a blatant piece of shit for anything non-Microsoft development-related
<Kovensky>
LiquidInsect: and access files through SMB? nothx
<LiquidInsect>
Kovensky: SMB?
<Veejay>
Kovensky: Double boot? VMWare>
<shevy>
Veejay yeah pretty much like linux too :>
<LiquidInsect>
no, just use the built in folder sharing
<LiquidInsect>
it's seamless
<Kovensky>
...which emulates a SMB server
<boom>
LiquidInsect: actually do you have a link to set that help?
<boom>
that would help me out
<shevy>
Veejay my plan is for RubyOS to save this world
<Veejay>
What do you mean RubyOS?
<shevy>
but it's too much work so it will never happen
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<shevy>
everything ruby!
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<LiquidInsect>
boom: haven't set it up myself but we use vagrant here, which uses virtualbox
<Veejay>
Ruby is a high-level dynamic language dude
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<Veejay>
Do you think it's possible to write a decent operating system with it?
<Veejay>
I mean a serious one
<LiquidInsect>
and our files sit in a folder in the host's filesystem which is shared to the VM
<LiquidInsect>
works fine
<shevy>
if I'd have some 100.000 man-hours sure
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<Veejay>
Unless there's a dramatic improvement in terms of speed it will not happen
<Kovensky>
Veejay: you could... if you wrote the operating system's services as C modules!
<rexbutler>
Okay, random question:
<LiquidInsect>
that's my dream, a green-threaded operating system
<LiquidInsect>
gag
<rexbutler>
what is the meaning of "tmp/**/*", ie a double ** in an RE?
<Veejay>
Kovensky: Then it's not really RubyOS anymore now is it though?
<Kovensky>
well, ruby itself isn't written in ruby, so... :>
<apeiros_>
LiquidInsect: because green threads is a language feature and not a runtime feature…
<Kovensky>
what are "green threads"
<shevy>
they were yellow then got bad and thus turned green
<apeiros_>
Kovensky: interleaved concurrency instead of true parallelism
<Kovensky>
cooperative threading?
<apeiros_>
no, that's orthogonal
<shevy>
Veejay if there would be an underlying VM, the language that is used would no longer have to matter or?
<Kovensky>
at any rate, ruby can't do real parallelism? :(
<LiquidInsect>
Kovensky: it can
<LiquidInsect>
depends on the vm
<Veejay>
shevy: How many operating systems are written in Java?
<apeiros_>
it means that no code is ever truly run in parallel, instead the scheduler interleaves the code of different threads
<LiquidInsect>
jruby uses real threads
<Veejay>
Serious ones I mean
<shevy>
Veejay none
<Veejay>
Exactly, none
<Kovensky>
what about YARV
<LiquidInsect>
but MRI/YARV use green threads
<shevy>
but that is no surprise. java is a shit language
<Veejay>
haha
<shevy>
it is not funny, it is sad
<Veejay>
Alright, peace, I'm out
<apeiros_>
*yarv uses real threads, but has a gil
<LiquidInsect>
oh does it
<LiquidInsect>
well
<LiquidInsect>
with the gil still there it might as well be green
<apeiros_>
similar in the end effect, but different for a couple of things
<LiquidInsect>
we'll see
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<LiquidInsect>
what happens in the next few years
<apeiros_>
it's better for threaded native extensions (easier to manage)
<Kovensky>
yeah, that was what just came to mind :S
<Kovensky>
so you can only do real threading with C extensions? :(
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<apeiros_>
no, as LiquidInsect said, you can do real threading with jruby
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<LiquidInsect>
Kovensky: or use another VM, like jruby
<apeiros_>
I think rubinius uses real threads + gil too and intends to drop the gil
<Kovensky>
not like I need it to do real computation (I run two threads in my code, but one just prints stuff to console once a second, and the other is just a SIGHUP monitor)
<LiquidInsect>
apeiros_: yeah. YARV has the same intent though, I think. Whichever one wins, I'm swicthing to for personal playground stuff
<apeiros_>
you don't need a thread for sighup trapping
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<Veejay>
apeiros_: No GIL anymore in the Hydra branch I think
<apeiros_>
LiquidInsect: I thought matz said short to longterm the gil will stay due to compat problems…?
<apeiros_>
Veejay: well possible, I'm not up to date with rubinius dev
<apeiros_>
gah, damit, 0200 - when did that happen?
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<Kovensky>
apeiros_: the SIGHUP handler sets a variable; that thread detects the variable change and sends #run to the main thread (which is probably in sleep state at that point)
<Veejay>
I'm extremely excited with Rubinius, but it's hard to gauge where they're going and how swiftly they're progressing from the outside
<apeiros_>
gotta get some sleep or I'll fall asleep during presentations tomorrow :-S
<Kovensky>
I tried sending #run from the SIGHUP handler itself but it wasn't working for some reason :S
<apeiros_>
Kovensky: oooh, good old issue
<Veejay>
Night, sleep tight, don't let the GIL bite
<Kovensky>
I just used the opportunity since I already had that thread polling for the config file's mtime
<apeiros_>
Kovensky: the scheduler sets the main thread back into the state before the trap proc was run
<apeiros_>
Kovensky: so if you wake up the main thread from within the sighup handler, it'll be set back to sleep again
<Kovensky>
lol
<apeiros_>
cost me an hour or so of my life to figure that one out…
<apeiros_>
yeah, lol and wtf - two for one! in a single package!