From: "David A. Black" <dblack@...>
Date: 2005-09-26T08:26:52+09:00
Subject: Re: String#ggsub

Hi --

On Mon, 26 Sep 2005, YANAGAWA Kazuhisa wrote:

> In Message-Id: <1127687058.509239.99690@f14g2000cwb.googlegroups.com>
> "Trans" <transfire@gmail.com> writes:
>
>> Oh better:
>>
>>   foo.gsub!( /.../, ... ) while $~
>
>    irb(main):001:0> s = 'foo'
>    => "foo"
>    irb(main):002:0> s =~ /never match/
>    => nil
>    irb(main):003:0> s.gsub!(/\w/, '*') while $~
>    => nil
>    irb(main):004:0> s
>    => "foo"
>
> So that's not context free.
>
> I tend to use
>
>    true while s.gsub!(/.../, ...)
>
> but probably OP doesn't like that because of extra `true'.

If you had reason to save the last match, you could do:

   m = $~ while s.gsub!(/.../, ...)

:-)  Also this would work, but it's probably too verbose:

   begin s.gsub!(/\w/,"*") end while $~


David

-- 
David A. Black
dblack@wobblini.net