From: Holden Glova <dsafari@...>
Date: 2002-10-26T13:06:14+09:00
Subject: Re: How to return multiple matches in Regexp?

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On Sat, 26 Oct 2002 15:46, Carl Youngblood wrote:
> I'm used to the perl modifier /.../g that makes sure that a regexp
> matches as many occurrences as possible.  How do you do this in Ruby?
>
> Thanks,
> Carl Youngblood

Hi Carl,

[synack@Evergreen] synack $ ri String.gsub
- ------------------------------------------------------------ String#gsub
     str.gsub( pattern, replacement ) -> aString
     str.gsub( pattern ) {| match | block }  -> aString
- ------------------------------------------------------------------------
     Returns a copy of str with all occurrences of pattern replaced with
     either replacement or the value of the block. If a string is used
     as the replacement, special variables from the match (such as $&
     and $1) cannot be substituted into it, as substitution into the
     string occurs before the pattern match starts. However, the
     sequences \1, \2, and so on may be used to interpolate successive
     groups in the match. These sequences are shown in Table 22.7 on
     page 376.
     In the block form, the current match is passed in as a parameter,
     and variables such as $1, $2, $`, $&, and $' will be set
     appropriately. The value returned by the block will be substituted
     for the match on each call.
     The result inherits any tainting in the original string or any
     supplied replacement string.
        "hello".gsub(/[aeiou]/, '*')              #=> "h*ll*"
        "hello".gsub(/([aeiou])/, '<\1>')         #=> "h<e>ll<o>"
        "hello".gsub('.') {|s| s[0].to_s + ' '}   #=> "104 101 108 108 111 "

- -- 
Signed,
Holden Glova
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