Module methods
in [Ruby]
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From: =?ISO-8859-1?Q?Une_B=E9vue?= on 27 May 2010 07:56 i wanted to have a Module method having the same name as another one (from Kernel ?) : module PlaySound .... def PlaySound.rand play a random sound end .... end then i had a stack overflow and found renaming the method to "PlaySound.random" was OK. I don' understand because i thougth Modules are designed to avoid names collision ? -- � L� o� la v�rit� n'est pas libre, la libert� n'est pas vraie. � (Jacques Pr�vert)
From: Jesús Gabriel y Galán on 27 May 2010 10:29 2010/5/27 Une Bévue <unbewusst.sein(a)google.com.invalid>: > i wanted to have a Module method having the same name as another one > (from Kernel ?) : > > module PlaySound > ... > def PlaySound.rand > play a random sound > end > ... > end > > then i had a stack overflow and found renaming the method to > "PlaySound.random" was OK. > > I don' understand because i thougth Modules are designed to avoid names > collision ? I guess you are doing something like this: irb(main):001:0> module PlaySound irb(main):002:1> def PlaySound.rand irb(main):003:2> rand irb(main):004:2> end irb(main):005:1> end => nil irb(main):006:0> PlaySound.rand SystemStackError: stack level too deep from (irb):3:in `rand' from (irb):3:in `rand' from (irb):6 from :0 The rand that you call inside the PlaySound.rand is itself, not Kernel's rand. Try this instead: irb(main):007:0> module PlaySound irb(main):008:1> def PlaySound.rand irb(main):009:2> Kernel.rand irb(main):010:2> end irb(main):011:1> end => nil irb(main):012:0> PlaySound.rand => 0.821838053097397 Jesus.
From: =?ISO-8859-1?Q?Une_B=E9vue?= on 27 May 2010 14:47
Jes�s Gabriel y Gal�n <jgabrielygalan(a)gmail.com> wrote: > I guess you are doing something like this: > > irb(main):001:0> module PlaySound > irb(main):002:1> def PlaySound.rand > irb(main):003:2> rand > irb(main):004:2> end > irb(main):005:1> end > => nil > irb(main):006:0> PlaySound.rand > SystemStackError: stack level too deep > from (irb):3:in `rand' > from (irb):3:in `rand' > from (irb):6 > from :0 RIGHT ! ))) > The rand that you call inside the PlaySound.rand is itself, not > Kernel's rand. Try this instead: > > irb(main):007:0> module PlaySound > irb(main):008:1> def PlaySound.rand > irb(main):009:2> Kernel.rand > irb(main):010:2> end > irb(main):011:1> end > => nil > irb(main):012:0> PlaySound.rand > => 0.821838053097397 i thought i had tried that too but may be with another error... right know, after your advice, it works ! thanks ! -- � L� o� la v�rit� n'est pas libre, la libert� n'est pas vraie. � (Jacques Pr�vert) |