Hmmm... I probably shouldn't have included String#scan in that, as scan
already has non-block behaviour (it returns an array). 

-----Original Message-----
From: Daniel Sheppard 
Sent: Friday, 16 September 2005 12:41 PM
To: ruby-talk ML
Subject: Enumerable methods returning Enumerable (was: ruby-dev suumary
26862-26956)

If I'm understanding the change properly, the following code should do
the same thing:

require 'enumerator'

{
	Array => [:each, :each_index, :reverse_each],
	Dir => [:each],
	Hash => [:each],
	IO => [:each, :each_byte, :each_line],
	Range => [:each],
	String => [:each, :each_byte, :each_line, :scan],
	Struct => [:each],
}.each { |c, ms|
	ms.each { |m|
		c.class_eval(<<-EOF)
			alias :__fix_enumerable_#{m} :#{m}
			private :__fix_enumerable_#{m}
			def #{m} (*args, &block)
				if block
					__fix_enumerable_#{m}(*args,
&block)
				else
					enum_for(:__fix_enumerable_#{m},
*args)
				end
			end
		EOF
	}
}

p "abcdefg".each_byte.collect { |x| (x+1).chr }.join => "bcdefgh"

-----Original Message-----
From: nobu.nokada / softhome.net [mailto:nobu.nokada / softhome.net]
Sent: Friday, 16 September 2005 7:53 AM
To: ruby-talk ML
Subject: Re: ruby-dev suumary 26862-26956

Hi,

At Fri, 16 Sep 2005 02:38:30 +0900,
Austin Ziegler wrote in [ruby-talk:156292]:
> >   [ruby-dev:26924] enumerator
> > Nobuyoshi Nakada made a patch to return Enumerator object when 
> > Enumerable method is called without block. It's applied to each or 
> > each-like methods in Array, Dir, Hash, IO, Range, String and Struct.
> > 
> >   http://www.rubyist.net/~nobu/ruby/enumerator.diff
> 
> Um. Any chance of seeing this in Ruby 1.8.x? I'm supposing this is 
> instead of a LocalJumpError.

It would be radical change for stable version, at least 1.8.3.

--
Nobu Nakada



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