From: Ross Bamford <rosco@...>
Date: 2006-01-03T09:37:58+09:00
Subject: Re: Implicit block parameter?

On Mon, 02 Jan 2006 22:06:49 -0000, Simon Strandgaard <neoneye@gmail.com>  
wrote:

> On 1/2/06, Simon Strandgaard <neoneye@gmail.com> wrote:
>> On 1/2/06, Ross Bamford <rosco@roscopeco.remove.co.uk> wrote:
>> > On Mon, 02 Jan 2006 20:20:30 -0000, I wrote:
>> >
>> > > Before I used Ruby, I used Groovy. In some ways they are (well, were
>> > > anyway) quite similar, and one feature that I found cool in Groovy  
>> that
>> > > I often miss in Ruby is the implicit (/default/whatever?) block
>> > > parameter, 'it':
>> > >
>> > >       [1,2,3].each { puts it }
>>
> or how about?
>
> module Kernel
>   def it
>     $i
>   end
> end
> class Array
>   alias :each1 :each
>   def each(&b)
>     each1{|i| b.call($i = i) }
>   end
> end
>
> [1, 2, 3].each{ puts it }           # 1 2 3
>

Cool, didn't consider doing it that way :) I was thinking in more general  
terms, but this way does get it working with each. I did notice, though,  
that it doesn't seem too happy with other Enumerable methods (select and  
collect seem pretty odd)...

Cheers,

-- 
Ross Bamford - rosco@roscopeco.remove.co.uk