<agarie>
hey, would you consider bad style for an object being printed in multiple lines? i.e. `puts NMatrix` show a matrix-like output, with indexes and stuff?
<agarie>
I'm discussing this and the other guy says he "never saw to_s spanning multiple lines" and I want to know other's opinions on the subject.
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<jblack>
Your output should be in a style that's most readable. =)
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<Siward>
Hello. I'm following a Ruby tutorial and one of the early lessons requires the execution of 'irb' in the command line. I installed ruby installer, and the command prompt doesn't seem to work.
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<jblack>
type "which irb" and "which ruby" please.
<jblack>
do they both say /usr/bin?
<jblack>
(/usr/bin/irb and /usr/bin/ruby to be mroe clear)
<Siward>
No. I'm pretty new at this, so I'm afraid I don't really know the specifics.
<jblack>
what answer do you get?
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<Siward>
When I type 'irb' into the command line?
<jblack>
sure.
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<jblack>
which operating system are you using?
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<Siward>
Windows 7. It just says it's not recongnized
<jblack>
Oh, sorry. I have no idea how to manage ruby under windows.
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<Siward>
Hm, alright.
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<C0deMaver1ck>
Siward, I use windows on a daily basis but it's a terrible place to write Ruby
<C0deMaver1ck>
I'd suggest setting up a Linux VM
<jblack>
You might even consider putting together a linux workstation if you're going to be doing a lot of development.
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<Siward>
That isn't really a viable option for me at the moment. I agree I'll eventually have to get a linux setup. Any idea how I can fix my current problem, C0deMaver1ck?
<C0deMaver1ck>
you should have irb in your start menu somewhere
<C0deMaver1ck>
since you used the installer
<jblack>
I wonder how ruby is under cygwin
<C0deMaver1ck>
icky
<C0deMaver1ck>
everything unixy under windows is icky
<Siward>
Yeah, it is. But according to this tutorial typing 'irb' into the command line should bring it up.
<jblack>
Yeah.
<jblack>
did you reboot yet?
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<C0deMaver1ck>
Siward, that's if you added it to your path or the installer did
<jblack>
surely the PATH was updated, and that may not take effect until reboot in windows
<C0deMaver1ck>
jblack, windows auto reloads the path if you modify it now
<C0deMaver1ck>
unless he's on something like XP
<jblack>
He said 7... but... for the heck of it, you could check the path with echo $PATH,
<Siward>
Just put that in the command line?
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<Tobarja>
is Class#[] usually the same as Class#slice ?
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<heftig>
Tobarja: Class doesn't implement either [] or slice
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<Arafangion>
Guys, I'm confused about how ruby binds to variables.
<Arafangion>
Does it bind to the variable objects, or to the variable names?
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<Arafangion>
I ask because given something like: [1,2,3,4].each{|i| foo = Foo.new; [4,3,2,1].each{|j| foo.invoke();}}
<Arafangion>
For which 'foo' does that inner scope refer to? (Particularly if it's a block that is executed later... That example there was very contrived)
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<Arafangion>
A more precise example is something like: @CONF.each do |conf| config = Config.new; Rake::Task.define_task 'name' do config.invoke(); end; end;
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<heftig>
Arafangion: the names
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<Arafangion>
heftig: So, if I wanted the values to be bound instead, what should I do? Define a mapping?
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<heftig>
not sure what exactly you want to do
<Arafangion>
heftig: I want the corresponding 'config' or 'foo' to be used for the given block.
<Arafangion>
heftig: Not whatever happens to be the value, but the value as it was defined at the time the block was defined.
<heftig>
the variable keeps living
<heftig>
because the block still references it
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<Arafangion>
heftig: Well, in the second example there...
<Arafangion>
heftig: I want the first instance of the inner block to be bound to the first instance of 'config'.
<heftig>
sure
<Arafangion>
heftig: And the second instance of hte inner block to be bound to the second instance of 'config', because that was the object at that time.
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<heftig>
sure, that works
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<heftig>
every invocation of the block creates a new "config"
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<Arafangion>
heftig: But what about the inner-block?
<heftig>
references the same context
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<Arafangion>
So it's slightly more similar to dynamic scoping, in that respect, I guess.
<heftig>
it's all dynamic
<Arafangion>
Ruby does not use lexical scoping?
<heftig>
only for constants, i think
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<heftig>
well, and self.
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<Arafangion>
Hmm, very useful to know - thanks.
<heftig>
though there are ways to change the "self" of a scope
<heftig>
instance_exec is one
<Arafangion>
One weird thing I have noticed is that I have a variable called 'name', which contains a string.
<Arafangion>
And a variable called 'config', which contains an object.
<Arafangion>
They appear to be bound differently to the inner scope.
<heftig>
hmm?
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<heftig>
"name" might also be a method call
<Arafangion>
No, it's definitely a variable, fairly sure.
<heftig>
the "map" creates 3 closures and returns them, then they get called in the "each"
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<heftig>
Arafangion: no, i don't think so
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<Arafangion>
That makse sense so far.
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<Arafangion>
Ok, I'm still confused with scoping. I've refactored and moved the problematic code to a smaller routine, and mangled the names for good measure.
<Arafangion>
The *second* 'throw' is being hit, within the closure.
<Arafangion>
Surely, if the second one is being hit, the first one should have been hit, too?
<heftig>
Arafangion: by the way, "raise" throws exceptions, not "throw"
<Arafangion>
Interesting.
<heftig>
throw/catch is orthogonal, and can throw arbitrary objects
<heftig>
but the exception stuff is raise/rescue (and ensure)
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<Arafangion>
Which explains why that still manages to throw the exception - which to my mind, is an unrecoverable error.
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<heftig>
a "throw" without a matching "catch" raises an ArgumentError exception
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<heftig>
(if a throw has a matching catch, execution jumps to the end of the catch)
<Arafangion>
I've changed my code locally to use raise instead - the output is slightly cleaner, but there is no functional difference.
<Arafangion>
jJC2config.name is still inexplicibly different to jJC2name.
<heftig>
yeah, the bug is somewhere else
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<heftig>
maybe you're mutating your config object somewhere you don't expect
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<Arafangion>
The only place that it should be mutated, is right after I use BtaskConfiguration.new.
<Arafangion>
(Which is what provides the config)
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<Arafangion>
I should put the washing out, maybe I'll come back with a cleaner head - if not, I might have to unit-test my <censored> build scripts.
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<Arafangion>
heftig: Thanks for your help. :)
<Arafangion>
Learnt two very important things in the process!
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<heftig>
Arafangion: throw/catch really doesn't work as exceptions - it works at the level of the instance, so you can only catch the exact object thrown
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<heftig>
Arafangion: not even catch("3") { throw "3" } works, as you have two different string instances
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<heftig>
(it wouldn't error with 3 or :"3", though, as those are singletons)
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<Boohbah>
i use a begin; rescue; end block for exception handling
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<Arafangion>
Hey, I found something curious - I neglected to mention that I was running Ruby 1.8.7 - somehow didn't htink it was relevant.
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<Arafangion>
I seem to think that the scoping rules were changed in Ruby 1.9.x?
<Arafangion>
(Even so, it still seems odd)
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<shevy>
I hate catch/throw
<shevy>
it somehow never fits with the rest of the ruby code
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<ChristianS>
shevy: why do you use it?
<manish>
hi can anybody tell me developing native andriod app using ruby is possible or not
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<ramblex>
manish, rubuto.org?
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<ramblex>
*ruboto
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<manish>
ramblex: can i use rhodes in linux?
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<shevy>
SAUCYSALAMANDER dunno, a bunch of crappy ones. I can't recommend them to anyone else yet really, I had two different people complain about a lack of documentation :P
<shevy>
I'll add my most important gem as soon as I have finished the current rewrite
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<SAUCYSALAMANDER>
shevy, impressive, too bad not on github
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<shevy>
SAUCYSALAMANDER i tried to :( I found it hard to sync my workflow with git + gems + github at the same time
<shevy>
one day I will!
<MrZYX>
github is just another git push origin master after the gem push ?
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<MrZYX>
now bundlers gem task even automatically tag, git push and gem push it for you :P
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<shevy>
ack, bundler
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<shevy>
bundler is way over my head
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<jokke>
hey, my class initializer accepts a block, which should be stored in a variable. I tried to do @task = &Proc.new but that gives me unexpected &
<MrZYX>
it's not that complicated really
<shevy>
I have not yet even mastered .gemspec format :D
<MrZYX>
bundler is way simpler than that
<jokke>
what am i doing wrong?
<shevy>
jokke isn't it so that you can only use & in method definitions?
<jokke>
isn't initialize a method?
<MrZYX>
shevy: you can use the rake tasks just fine without using bundler for dependency management btw
<shevy>
or rather, where have found the &
<shevy>
MrZYX ack, rake
<shevy>
I am going to first master 'gem' :D
<shevy>
jokke yes, initialize() is a method
<MrZYX>
add require "bundler/gem_tasks" to your Rakefile and run rake -T
<jokke>
so where's the problem?
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<shevy>
jokke did you read what I asked :(
<jokke>
definitions
<jokke>
ah
<shevy>
the syntax
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<shevy>
I never saw &Proc.new before so I wonder where you got that?
<shevy>
I see it used like:
<shevy>
def test(&i); i.call; end; test { "atest" }
<MrZYX>
Proc.new works too to capture a block
<jokke>
there was a way to access the block given to the method from within it
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<jokke>
ah without the &
<jokke>
thats it
<jokke>
thanks
<MrZYX>
so some_method(&Proc.new) can be used to pass a block to another method
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<shevy>
cool, never saw that before
<MrZYX>
I too prefer def foo(&block) though
<jokke>
but Proc.new without a block "catches" the block passed to the method, right?
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<MrZYX>
yup
<jokke>
great
<fdfgdf>
hi does anyone have any experience with C++?
<jokke>
you guys heard of the subtle wm? It's so awesome it makes me wanna cry
<MrZYX>
jokke: but as said the more obvious way to do it is def initialize(&block) @block = block; end
<jokke>
MrZYX: ah i see
<jokke>
yes that's much more readable
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<MrZYX>
block can be anything here, it's just the variable name
<jokke>
does it work when put behind an optional variable?
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<MrZYX>
yup
<jokke>
ok
<jokke>
great
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<shevy>
jokke I heard of it, yeah. do you use it? I am on kde4 right now
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<shevy>
I'd want a RubyOS so using subtle wm would bring me a little closer to that, than kde4
<jokke>
shevy: yeah i've been using it for a few months now. I love ruby and being able to write extensions for a window manager in ruby is just awesome
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<shevy>
cool
<jokke>
note that the wm is written in c mostly
<shevy>
one day I shall switch then :D
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<shevy>
(I am still on ruby 1.8.7 ...)
<jokke>
but it's configured in ruby.
<jokke>
and the extensions are written in ruby
<Mon_Ouie>
There are a couple of people here who have been using it for a long time now I think
<MrZYX>
shevy: I should hack your rubygems account and add s.required_ruby_version = '>= 1.9.2' to all your gemspecs ;P
<jokke>
:D
<shevy>
MrZYX hahaha
<Mon_Ouie>
1.9.2 is old, time to switch to 2.0!
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<MrZYX>
sure, but the current objective is to eliminate the 1.8 people iMO
<jokke>
can you guys recommend a good c-bindings tutorial?
<MrZYX>
so we should add that line to all our gemspecs :P
<shevy>
MrZYX :(
<jokke>
i've got just a little experience in C, but i need to use a C library in a ruby project.
<MrZYX>
no reason to be said, just switch
<shevy>
jokke dunno, I found it confusing... I think you really need to be rather good with C before you can make sense of things
<jokke>
meh
<MrZYX>
ew, sad
<Mon_Ouie>
There's the README.EXT that contains information to get started
<MrZYX>
recently a guy wanted to argue that C is OO as well since structs are objects really
<jokke>
haha
<jokke>
ahaha
<shevy>
MrZYX yeah I think it depends on how you define "objects"
<shevy>
I go with Alan Kay here
<jokke>
theres a big difference between objects and data structures
<Mon_Ouie>
People usually don't say that the language isn't OO, but that you can program in an object oriented style in it
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<Mon_Ouie>
Similarly a lot of Java code doesn't qualify as OO according to certain definitions
<shevy>
what I always found confusing was that most definitions of OOP include private vs. public (vs. protected)
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<jokke>
objects can do things and shouldn't expose their internals, which is exactly the opposite of what a data structure is. It _does_ expose its internals and doesn't do anything
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<shevy>
does smalltalk have private vs. public too?
<Mon_Ouie>
It has a naming convention for internal methods I believe
<Mon_Ouie>
And instance variables are private as in Ruby
<jokke>
as they should
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<Mon_Ouie>
One thing is that class Point { int getX(); int getY(); void setX(int x); void setY(int y); … } is no better than struct Point { int x, y; }
<jokke>
the thing is, in ruby you cannot distinguish a getter or setter from a method. That is what makes the object really an object. You don't need to know of it's internal stucture. It's just a black box that exposes methods to manipulate it from the outside.
<jokke>
Mon_Ouie: they are both data structures technically speaking
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<Mon_Ouie>
What definition of data structure you use? I think of something that would include linked lists, arrays, hash tables, etc; but that's orthogonal to object orientation though.
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<jokke>
Mon_Ouie: a data stucture is like a container holding data. You can access every bit of it from the outside and it does not have any method that would manipulate it's content except for setters.
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<MrZYX>
array.map!(:to_s) so array (in ruby) isn't a data structure?
<jokke>
no it's an object in ruby
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<shevy>
hmmm
<MrZYX>
Struct.new(:foo).class, so Struct is neither?
<shevy>
would it be possible for ruby to do away with symbols from using it in a .rb file point-of-view? I feel symbols confuse newcomers often, for little real gain
<shevy>
jokke even world wars can happen due to reasons of misunderstanding based on different definitions and point of views :D
<shevy>
I want a language like ruby, but simpler, whose OOP model is more akin to real biological cells
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<jokke>
Hm? How does that differ from "my" definition?
<Mon_Ouie>
Operations like adding an element to a hash table or retrieving it are an important part of the definition of the hash table
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<jokke>
yes. And they don't differ much from getters and setters
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<Mon_Ouie>
I believe what makes a system object oriented is the fact that the objects themselves decide how they behave in it, instead of having the system being entirely manipulated by it
<Mon_Ouie>
So one can replace the objects in the system to change the way it behaves
<shevy>
hmm
<shevy>
like ants
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<jokke>
the file point.rb obviously describes a datastructure
<jokke>
the better_point.rb is an object. There is no way for you to know from the outside whether the class uses cartesian or polar coordinates. Which i mixed up i see... :D
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<jokke>
it doesn't expose it's internals to the outside world.
<Mon_Ouie>
It's just an immutable version of Point with other methods attached to it
<jokke>
ideally you would make the constructor private and allow creating points only with class methods cartesian and polar
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<jokke>
Mon_Ouie: but it is no longer just a data structure because it hides its internals properly
<jokke>
okay ruby does this by default so it's harder to demonstrate here but in java for example you can have public instance variables. So you would have something like point.x as opposed to point.getX()
<jokke>
the first would be used for raw data structures and nowhere else (ideally)
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<Mon_Ouie>
How does it not expose more of its internals?
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<Mon_Ouie>
Just add attr_writer :x, :y and it won't make a difference
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<jokke>
yes it does. I could change the whole implementation to use polar coordinates internally and it wouldn't make a difference
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<jokke>
it would continue to work as you expect it to
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<jokke>
it's not as critical in ruby, since you cannot directly access instance variables, but think of this written in java where you would use point.x to get the x coordinate. Now consider you need to change the implementation so that it will use polar coordinations internally. First you would need to create getters for x and y (which technically wouldn't be just getters. They would have to calculate the values from
<jokke>
the radius and theta) Then you would have to change every occurence of point.x or point.y to point.getX() and point.getY(). It's a pain to expand or rewrite data structures.
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<Mon_Ouie>
You can change the whole implementation in both classes
<jokke>
in ruby you can
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<jokke>
thats one of the reasons i like ruby very much
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<Mon_Ouie>
That's my point, being a data structure and being object oriented are entirely orthogonal
<jokke>
the convention to just use the variable name in the getter and with the = for setters makes things beautifully simple.
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<jokke>
and the fact that you cannot expose raw instance variables to the outside world.
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<bibi23>
hi, I'm using a tool requiring some configuration files written in Ruby, in a sample config file, I can see the first line is "# -*- mode: ruby -*-", and there is a second line "# vi: set ft=ruby :", those look like comments? What are they for? thx
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<ramblex>
bibi23, they're for the editor vi
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<bibi23>
ramblex: ok thx
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<MrZYX>
ramblex: isn't # -*- emacs?
<Mon_Ouie>
The first one is for Emacs, the second one for vi(m)
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<matti>
Mon_Ouie: ;]
<Mon_Ouie>
'alut matti ;)
<matti>
LTNS
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<icy`>
but why would someone want to change the file type to emacs or vim
<icy`>
sorry, i meant why would someone want comments that, for example, set the file type to ruby
<Mon_Ouie>
So the editor can enable proper syntax highlighting, etc.
<MrZYX>
in your Rakefile for example
<icy`>
k
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<atir_>
I'm getting the error "[ERROR] no such file to load -- bundler/setup". I have installed the bundler with gem install bundler but still get the same error
<atir_>
any ideas ?
<Spooner>
My editors (Rubymine & Sublime Text) are more than happy with Rakefiles as is.
<Spooner>
atir_, Are you using Ruby 1.8.7?
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<atir_>
Spooner: I'm running the script with "ruby1.9.1 script.rb"
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<Spooner>
Ah, you installed it with apt-get (or similar) rather than a sensible way? ;)
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<Spooner>
You have other versions of Ruby installed?
<MrZYX>
atir_: do you have a gem1.9 or something?
<atir_>
Spooner: yes the 1.8 but with that version the script does not work
<atir_>
that's way I install the 1.9
<Spooner>
I'm suspecting you are installing gem to 1.8 and then running the script with 1.9
<atir_>
not sure (ruby amateur)
<MrZYX>
yeah, usually there's a gem19 or something like that
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<atir_>
so I install bundler with: gem1.91 install bundler ?
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<Mon_Ouie>
Or installing it in 1.8 and running it in 1.8 and not requiring rubygems before
<Spooner>
I'd strongly recommend using somethign to manage your versions rather than system ruby (rvm/rbenv/etc). Really makes things simpler.
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<icy`>
by the way, is there a way to cache off the list/description of gem searches
<atir_>
if I uninstall the 1.8 would be ok ?
<icy`>
gem search -r something (to make a local search and not go online every time)
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<icy`>
like eix for gentoo
<atir_>
thank you so much Spooner MrZYX Mon_Ouie ;)
<atir_>
really appreciate
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<MrZYX>
icy`: gem list?
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<icy`>
MrZYX, for example if i do "gem search -dr nokogiri" and i want instant results from my cache
<icy`>
something that already downloaded all the gems and descriptions
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<MrZYX>
-dl then?
<icy`>
gem list is close i guess, but only returns nokogiri*
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<icy`>
Deprecated Options:
<icy`>
-u, --[no-]update-sources Update local source cache
<icy`>
hm o.O
<icy`>
looks like it used to be a feature
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<icy`>
hm.. i would like to search rubygems.org without going to rubygems.org
* icy`
ponders
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<mixel>
gem search --remote noko
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<icy`>
oh, didnt realize i could search without a search term
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<icy`>
mixel, the idea was to cache "gem search -dr"
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<icy`>
for example, for i in {nokogiri,watir}; do gem search -dr $i >> gemsearch_cache; done
<icy`>
but changing the range to {a..z}
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<icy`>
it could take a long time
<icy`>
i mean gem list, not search sorry
<MrZYX>
why do you need that?
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<icy`>
the principle
<icy`>
i dont need it
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<icy`>
how big do you think the file would be? =P
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<MrZYX>
~330k lines
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<jokke>
I have a file called rules.rb which creates several objects of type Rule. The rule class definition is in another file. In this other file i then require the file rules.rb. This failes because ruby doesn't recognize the constant Rules..
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<jokke>
can i somehow pass something to require or how should i do this?
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<jokke>
i can't add the content of rules.rb to the other file
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<MrZYX>
preferably require the definition at the top of rules.rb and run rules.rb
<jokke>
MrZYX: i cannot do that
<MrZYX>
but requiring rules.rb at the end of the definition should work too
<MrZYX>
why not?
<jokke>
you can see rules.rb as a kind of config file
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<MrZYX>
I'd consider a third file load_config.rb or whatever that requires the definition and then the config file then
<MrZYX>
makes the intent clearer IMO
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<jokke>
unfortunately i can't do that either.. :/
<MrZYX>
so, putting the require 'rules' after the class definition should work
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<jokke>
i'm expanding a sublet (extension for a window manager). And sublets can only have 2 files one containing the code and another containing specifications
<jokke>
MrZYX: yes i thought so too, but it doesn't
<MrZYX>
hm
<MrZYX>
okay, ugly but try load
<jokke>
load?
<MrZYX>
and hope it's only loaded one time
<MrZYX>
Kernel#load, yeah
<jokke>
oh god
<jokke>
on the other hand the requiring itself isn't the problem. The file gets loaded but somehow its not in the same namespace or what not
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<MrZYX>
yeah, doing a quick test requiring after the class definition really should work
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<jokke>
ah i think require also evaluates the file. And thats in the default namespace i guess.
<jokke>
can i wrap the Rule.new calls into something so that i could have controll over when they're evaluated?
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<jokke>
it needs to look user friendly
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<jokke>
i don't consider rules = lambda do; ... Rule.new calls ... end very user friendly
<banisterfiend>
jokke: pass a block
<jokke>
pass a block to require?
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<jokke>
is that possible?
<banisterfiend>
no
<jokke>
then what do you mean?
<MrZYX>
def add_rule(*args, &block); rules << -> { Rule.new(*args, &block) }; end or whatever, but it won't solve your problem, it doesn't make the lack of the constant go away
<banisterfiend>
i got no idea what u're talking about tbh
<jokke>
:)
<jokke>
MrZYX: that won't be very intuitive either
<jokke>
in rails you see this all the time though: configure do; blabla; end
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<jokke>
where does it get the configure from?
<MrZYX>
def add_rule(*args, &block) $rules ||= []; $rules << [args, block]; end; then user says add_rule "foo", "bar" { "baz" } then you again say $rules.each do |args, block|; Rule.new *args, █ end
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<jokke>
meh
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<banisterfiend>
MrZYX: let's ban this guy, nothing you do is good enough and i have a feeling he's a mean spirited little sprite
<MrZYX>
;D
<MrZYX>
he has to cope with a weird WM
<banisterfiend>
with a name like "jokke" he sounds like an evil elf
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<MrZYX>
jokke: I've never seen configure called on the main scope, always Something.configure
<icy`>
banisterfiend sounds almost serious o.O
<banisterfiend>
icy`: it's more fun when they think you mean it
<banisterfiend>
;)
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<icy`>
MrZYX, out of curiosity, i cached "a" -- took 3min, 44sec, 22543 lines, takes up 608K space
<MrZYX>
how many gems are that?
<icy`>
sec, didnt check
<icy`>
3458
<MrZYX>
so just > 51k to go
<icy`>
from gem list -r a | wc -l
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<slash_nick>
Hey guys... I just want to mention this gem: pay_dirt, http://goo.gl/pr1Iv ... I love the pattern it provides, but feel like it needs some syntactic sugar before people will be comfortable with it..
<slash_nick>
I'd appreciate input :)
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<shevy>
seems complicated
<shevy>
but then again I am a one liner person
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<shevy>
slash_nick what is the main advantage of pay_dirt ?
<slash_nick>
shevy: my goal is to get a few people to stop tieing business logic to their rails models
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<slash_nick>
shevy: I find that logic implemented using this pattern is super easy to test... just mock and inject dependencies
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<shevy>
yeah can't say anything
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<shevy>
it seems way over my head
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<slash_nick>
:( i bet it's not... jadams from #isotope11 introduced it to me a few years ago, and I love it... finally put it in a gem so I can quit cp'ing it from project to project
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<platzhirsch>
what I need is basically a Struct. Any idea where I should globally define the Struct.new(:attr1, :attr2,...) etc. so I don't have to do it everytime I need one?
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<Spooner>
platzhirsch, MyStruct = Struct.new(...)
<platzhirsch>
Spooner: oh it just needs to be run once somewhere and then it is available, isn't it?
<MrZYX>
a common pattern is also to do class MyStruct < Struct.new(..); ....; end
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<platzhirsch>
MrZYX: would work for me, as I have started with a separate class anyway
<Spooner>
I think you are supposed to do MyStruct = Struct.new() do end instead (otherwise you have an extra ancestor level for no reason).
<Spooner>
I got told off for doing that myself ;)
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<platzhirsch>
Spooner: extra ancestor level?
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<MrZYX>
the advantage is that MyStruct.class.name isn't Class
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<platzhirsch>
MrZYX: ok, but how is that an advantage?
<MrZYX>
debugging
<banisterfiend>
MrZYX: i hate that pattern
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<MrZYX>
easy to find out what type of struct you got now
<MrZYX>
in case you accidentally pass the wrong one
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<jokke>
:q
<jokke>
ups
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<jokke>
okay back to my require problem: following gist https://gist.github.com/supasnashbuhl/5477430 contains the relevant code. On line 144 in battery.rb i require the file battery_rules.rb and its beneath the Rule class definition. Any ideas why it still goes wrong? (No method error: no method new for nil:NilClass)
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<MrZYX>
try p require 'battery_rules', does it return true or false?
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<jokke>
try where?
<MrZYX>
144
<jokke>
ah ok
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<jokke>
it seems it doesn't even get to that point, because it throws the error before returning anything
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<MrZYX>
so the system is requiring it somewhere before you try manually
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<jokke>
you think so?
<MrZYX>
yup
<jokke>
hm, hard to believe. I'll remove the whole require part and see what happens
<MrZYX>
though I'm confused that you get a NoMethod for nil instead of a uninitialized constant
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<jokke>
nope...
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<jokke>
if i remove it i get no errors
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<jokke>
MrZYX: yes me too. Very weird
<MrZYX>
did you to change it to BatteryRule or so?
<jokke>
*try to?
<jokke>
no i didn't
<jokke>
worth a try i guess
<MrZYX>
maybe you run into name conflict
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<jokke>
yup
<MrZYX>
Rule is a pretty generic name
<jokke>
true
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<infecto>
What is the cleanest way to unnest nested arrays?
<lewis>
splat operator
<MrZYX>
or #flatten
<MrZYX>
depending on what you mean by unnesting
<jokke>
MrZYX: nope, no effect. I think it throwing a NoMethod error might have to do with the DSL the wm is using.
<infecto>
ahah! somehow missed flatten! Thank you lewis and MrZYX
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<MrZYX>
he said it doesn't work, so he isn't on 2.0 yet
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<withnale>
Didn't realise it was a 2.0 vs 1.9.3 thing. We're close to migrating
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<banisterfiend>
MrZYX: ah i didnt see that
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<BinaryMstr>
Can anyone help me out with understanding an error I'm getting? I am getting the following error from this code http://pastebin.com/tbCFGw1V :ERROR::-> return can't jump across threads
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<MrZYX>
the return would return from the method, but it can't since it's in a new thread
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<BinaryMstr>
so pull out the return statement from the thread block?
<MrZYX>
yup
<BinaryMstr>
is there a better way to write the method then how I did it?
<BinaryMstr>
or should I say a more ruby way to write that method
<MrZYX>
I'm not sure what it does tbh
<LennyLinux>
You could create a shared variable inside a critic region, but i don't know how to do it in Ruby
<LennyLinux>
Check any ruby threads guide and it will be explained for sure
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<BinaryMstr>
Thank you
<MrZYX>
BinaryMstr: do you actually need the return value?
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<BinaryMstr>
No
<BinaryMstr>
I can get it out later from the objects when I need it
<MrZYX>
source.map { |_, tag| Thread.new(tag, &:get_tag) }.each(&:join) then
<BinaryMstr>
each thread is doing an svn checkout of a project, after the checkout is done then it goes on to creating links to and from other projects
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<tarOFF>
re
<tarOFF>
hi
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<tarOFF>
I'm getting the error "Could not find gem 'typhoeus (= 0.6.2) ruby'"
<tarOFF>
and If I do "gem1.9.1 list" I get typhoeus (0.6.3)
<tarOFF>
any idea to solve this ?
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<unstable>
tarOFF: What operating system?
<csmrfx>
tarOFF: which ruby
<csmrfx>
(literally, in shell)
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<unstable>
tarOFF: which ruby; which gem; ruby -v; gem -v; gem list --local|grep typhoeus; (pastie all of these)
<unstable>
Lodos: I've discoverd that there is no genetic or innate ability to basic programming. The people who are good have a lot of hours. Just keep programming and making more stuff, get your hours count high.
<LennyLinux>
banisterfiend: i see, so that's the only way? I should define the var inside a bloc?
<banisterfiend>
LennyLinux: well in practice this should *really* not be an issue
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<banisterfiend>
LennyLinux: or are you creating procs inside a loop or something?
<Xeago>
banisterfiend: offtopic, how much do you pay per month for your internet connection, and what do you get?
<banisterfiend>
Xeago: 20 a month, infinite quota, about 1 meg/second
<Lodos>
i known php c++ c#
<banisterfiend>
Xeago: u?
<unstable>
Lodos: ok, so you should get through those guides much faster than someone who doesn't know any languages.
<Xeago>
paying that here in sweden too, 200mbit sync, no quota
<Xeago>
sorry, I lied, 24eur/month
<Xeago>
come to sweden yo :)
<LennyLinux>
banisterfiend: yes, you're right, it shouldn't be an issue. Mine was just speculation. THank you so much
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<banisterfiend>
LennyLinux: the 'let' method is my girl.
<banisterfiend>
i hope we get it in ruby
<LennyLinux>
JS? :)
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<banisterfiend>
LennyLinux: more like coffeescript's 'do'
<Lodos>
unstable : thanks
<LennyLinux>
Uh. I like the prototype paradigm :P
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<banisterfiend>
LennyLinux: i dont :) I prefer the coffeescript way of doing things
<banisterfiend>
LennyLinux: also, if you look at any of the major MVC frameworks for JS, they all have their own make-shift concept of a 'class' anyway
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<banisterfiend>
in my experience anyway
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<LennyLinux>
Yes, now that you're mentioning it i noticed . I'd like something like this n = 10; p = proc(n) {|x| x * n}; p[3]
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<LennyLinux>
(sorry for my english)
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<LennyLinux>
Xeago: 200mbit? I've so much envy right now
<ziggles>
Hi guys I'm working on a console based pomodoro timer and i have a RSpec spec for my cli that looks like this: http://pastie.org/private/alzgtisrv1ssmdjnv4udg unfortunately i have to wait 25 minutes for this test because it's starting a REAL pomodoro timer...
<ziggles>
Any pointers on what i should be doing to side step having to wait that long?
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<MrZYX>
ziggles: look into the timecop gem
<joshu>
hi is this @page ||= "1" the same as @page = @page || "1" ?
<MrZYX>
joshu: yes
<joshu>
thank you MrZYX
<Mon_Ouie>
Beware tough, x ||= y and x = x || y aren't equivalent in the general case
<Mon_Ouie>
Am I supposed to choose which one you're going to perform?
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<MrZYX>
Morrolan: quick shot would be trying to run rehash
<banisterfiend>
Mon_Ouie: no..my bro's french gf thinks they mean the same thing (her english is to messed up to comprehend the difference) so he teases her by saying "prank or pun?". So in lieu of my own french gf i thought i'd say it to you
<banisterfiend>
Mon_Ouie: is that ok?
<banisterfiend>
too messed up*
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<Morrolan>
MrZYX: Oh, hash keys are cached, so when one of the key's attributes changes it might mess things up, eh.
<Mon_Ouie>
I know the difference. We call them differently too. A pun is "un jeu de mot", a prank is "une farce" (or other words based on the context)
<MrZYX>
Morrolan: yup
<Morrolan>
MrZYX: That might explain it, thanks. :)
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<joshu>
so if I want to write a decrement statement of @page until it reaches 1…so @page = 3 …. @page - 1 until @page = 1
<joshu>
not in a loop
<waxjar>
@page.downto(1) do … end
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<atmosx>
joast: there are at least 4-5 known ways
<atmosx>
waxjar: gave you the most straighforward I guess
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<joshu>
waxjar but that is a loop right until @page = 1 do something in the do end block?
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<waxjar>
it's not a loop, but yeah that's what it'd do
<MrZYX>
it does use a loop internally ;P
<joshu>
I see if I don't want an looping as the user changes the @page value how do I take the user's value and subtract 1 unless @page = 1 in which case I just leave it
<joshu>
apologies if I'm not being clear
<MrZYX>
@page -=1 unless @page == 1
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<Spooner>
Or: @page = [@page-1, 1].max # Well, OK, that makes more sense for numbers greater than -1
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<joshu>
I think I almost got what I need I have this at the moment older_posts = @page + 1 unless @page == @total_pages
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<joshu>
I just need to change the "unless" so that older_posts is set to the value of @page when @page == @total_pages is true. do I write it with the conditional ? like this
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<MrZYX>
I think I prefer the older_posts = [@page+1, @total_pages].min variant then
<joshu>
MrZYX what do you call that variant so I can google it
<MrZYX>
I don't think it has a name
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<joshu>
hehe ok so it does what I was trying to di. it increments @page until @page equals @total_pages. what does the .min do?
<MrZYX>
minimum
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<jabawack81|S>
Hi
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<pehlert>
Hey folks. I may be mistaken here, but afaik Ruby 2.0 supports dtrace probes, right? But couldn't you use ruby:::function-entry on pre-2.0 versions as well?
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<mike_ng>
Hi - can someone clear up my confusion? What do people mean by hashes? I've used hash tables and hash functions before - but when people just say hash what do they mean?
<banisterfiend>
mike_ng: usually hash table
<banisterfiend>
this things {}
<banisterfiend>
thing*
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