From: Stefano Crocco <stefano.crocco@...>
Date: 2008-02-26T23:19:46+09:00
Subject: Re: # arguments to rand

Alle Tuesday 26 February 2008, d c ha scritto:
> hi -
>
> can someone help with suggesting what is wrong below? i am trying to
> add a simple method to array#random
>
> but get the wrong number of args error...
> have tried lots of variations!
>
> >> class Array
> >>   def random
> >>     n = rand(self.size.to_i)
> >>     return self[n]
> >>   end
> >> end
>
> => nil
>
> >> [1, 2, 3].random
>
> ArgumentError: wrong number of arguments (1 for 0)
> 	from (irb):14:in `rand'
> 	from (irb):14:in `random'
> 	from (irb):18
>
> >> rand(3)
>
> => 1
>
> >> rand(3)
>
> => 1
>
> >> rand(3)
>
> => 2
>
>
> tx
>
> /dc

It works for me. By the way, you don't need the to_i in the call to rand: 
Array#size is already and integer.

Stefano