From: ts <decoux@...>
Date: 2004-04-04T00:53:47+09:00
Subject: Re: [newbie] How do I match a regex multiple times?

>>>>> "R" == Robo  <robo@mars.com> writes:

R> e.g. puts 'robo ruler ruby'.match(/r\w+/)

 String#scan

svg% ri String#scan
------------------------------------------------------------ String#scan
     str.scan(pattern)                         => array
     str.scan(pattern) {|match, ...| block }   => str
------------------------------------------------------------------------
     Both forms iterate through _str_, matching the pattern (which may
     be a +Regexp+ or a +String+). For each match, a result is generated
     and either added to the result array or passed to the block. If the
     pattern contains no groups, each individual result consists of the
     matched string, +$&+. If the pattern contains groups, each
     individual result is itself an array containing one entry per
     group.

        a = "cruel world"
        a.scan(/\w+/)        #=> ["cruel", "world"]
        a.scan(/.../)        #=> ["cru", "el ", "wor"]
        a.scan(/(...)/)      #=> [["cru"], ["el "], ["wor"]]
        a.scan(/(..)(..)/)   #=> [["cr", "ue"], ["l ", "wo"]]

     And the block form:

        a.scan(/\w+/) {|w| print "<<#{w}>> " }
        print "\n"
        a.scan(/(.)(.)/) {|a,b| print b, a }
        print "\n"

     _produces:_

        <<cruel>> <<world>>
        rceu lowlr

svg% 


Guy Decoux