From: Gary Wright <gwtmp01@...>
Date: 2007-04-06T14:48:00+09:00
Subject: Re: about functional programming


On Apr 6, 2007, at 1:15 AM, gaoxtwarrior wrote:

> when it comes the method needs two block to accomplish a task,how  
> the ruby
> do which? for example , the classical sum(filter,mapping,iterator) 
> (I have
> forgotten the style, maybe,the one can search it in SICP)

Ruby's block syntax is just a special (and very useful) case for a  
single
block but you can construct proc objects and pass them directly if you
you have a need:

def merge(a,b,c)
   [a.call, b.call, c.call].join('/')
end

result = merge( proc { "first block" }, proc { "second block"}, proc  
{ "third block" } )

puts result    # "first block/second block/third block"



Gary Wright