From: "Florian Groß" <florgro@...>
Date: 2005-09-26T22:55:48+09:00
Subject: Re: How each class splats

Trans wrote:

> First I'll just ask it there's a way to do this WITHOUT redefining
> #each in Array.
> 
>   class A
>     def initialize(i,v)
>       @i,@v=i,v
>     end
>   end
> 
>   arrayofA = [ A.new(:a,1), A.new(:b,2) ]
> 
>   arrayofA.each { |e| p e }
>   => #<A @i=:a,@v=1>
>      #<A @i=:b,@v=2>
> 
>   arrayofA.each { |i,v| p i,v }
>   => :a
>      1
>      :b
>      2

Try this:

> class A
>   def initialize(i,v)
>     @i, @v = i, v
>   end
> 
>   def to_a()
>     [@i, @v]
>   end
> end
> 
> ary = [A.new(:a, 1), A.new(:b, 2)]
> ary.each { |a| i, v = *a; p i, v }

In theory .each { |(i, v)| ... } should also work, but it seems that 
Ruby doesn't call .to_a there. (I think it should do so.)