Module methods

Ruby
1

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 ?

2

2010/5/27 Une Bévue [email protected]:

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.

3

Jesús Gabriel y Galán [email protected] wrote:

  from (irb):3:in `rand'
  from (irb):3:in `rand'
  from (irb):6
  from :0

RIGHT ! )))

=> 0.821838053097397
i thought i had tried that too but may be with another error…

right know, after your advice, it works !

thanks !