From: Saku Ytti <saku@...>
Date: 2008-04-12T04:10:25+09:00
Subject: Re: delete_if, select and (lack of) delete_if!, self.POLS == false

On (2008-04-12 04:04 +0900), Robert Dober wrote:
 
> x=[*0..1]
> x.select{|n| n.even?} -> [0]
> x -> [0,1]
> x.reject!{|n| n.odd?} -> [0]
> x -> [0]

Not sure what's going on there, but this looks correct to me:

irb(main):001:0> class Array;def reject!(&blk)
irb(main):002:2> select(&blk).each{|e|delete e};end
irb(main):003:1> def select!(&blk)
irb(main):004:2> reject(&blk).each{|e|delete e};end;end
=> nil
irb(main):005:0> x=[*0..1]
=> [0, 1]
irb(main):006:0> x.select{|n| n.even?}
=> [0]
irb(main):007:0> x
=> [0, 1]
irb(main):008:0> x.reject!{|n| n.odd?}
=> [1]
irb(main):009:0> x
=> [0]
irb(main):010:0> 

> 
> Cheers
> Robert
> 
> >  --
> >   ++ytti
> >
> >
> 
> 
> 
> -- 
> http://ruby-smalltalk.blogspot.com/
> 
> ---
> Whereof one cannot speak, thereof one must be silent.
> Ludwig Wittgenstein
> 

-- 
  ++ytti