From: ts <decoux@...>
Date: 2002-10-22T20:09:59+09:00
Subject: Re: newby asks: giving regexps as argument for funvtions

>>>>> "T" == T-Online  <daniel.schnell@embeddedware.de> writes:

T> i want to pass a regular expression as a parameter to ruby. Tthe following
T> code snippet can be made easier but it shows the principle I want to
T> understand:

 In your example you give it a String not a Regexp

   def findPosRE(str, re)
      m = re.match(str)
      m.begin(0)
   end

   pos = findPosRE ("hey you behind the wall", /behind/)

 but it will give an error if the regexp don't match

T> def     findPosRE(str, re)
T>     m = %r{re}.match(str)
T>     return m.begin(0)
T> end

 If you want to give it a String

   def findPosRE(str, re)
      m = %r{#{re}}.match(str)
      m.begin(0)
   end

   pos = findPosRE ("hey you behind the wall", "behind")


Guy Decoux