From: David Alan Black <dblack@...>
Date: 2002-07-07T23:06:00+09:00
Subject: Re: is there a better string.each?

Hello --

On Sun, 7 Jul 2002, Dossy wrote:

> On 2002.07.07, Tobias Reif <tobiasreif@pinkjuice.com> wrote:

> > I think String#characters should pass objects of class Character to the
> > block.
> >
> > 'foo'.chars do |char|
> >   puts char
> > end
> > # f
> > # o
> > # o
>
> That's limiting.  What if you wanted an Array of the Character objects?
> You'd have to do something like:
>
> charArray = []
> 'foo'.chars { |char| charArray << char }

Not if the return value is an array.  This example doesn't include
class Character, but you can see the principle:

  class String
    def chars
      split("").each {|c| yield c if block_given?}
    end
  end

  p "abc".chars
  "abc".chars {|c| puts "char: #{c}"}

Output:

  ["a", "b", "c"]
  char: a
  char: b
  char: c

(My approach to #chars may be a little wasteful, as it tests for block
for every character, but I like its conciseness :-)


David

-- 
David Alan Black
home: dblack@candle.superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav