From: ts <decoux@...>
Date: 2000-11-19T01:57:42+09:00
Subject: [ruby-talk:6440] Re: variable in regular expression

>>>>> "m" == markus jais <mjais@web.de> writes:

m> old = ARGV[1]
m> new = ARGV[2]

 This is the same than perl (it begin at 0)

  old = ARGV[0]
  new = ARGV[1]

m> dir = Dir.new(".");
m> while line = dir.read
m>   next if line == "." or line == ".."
m>   puts line
m>   line.sub!(/old/,  new)    #!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Error

 You must write /#{old}/ to expand the variable 'old' otherwise ruby think
that it's the string "old"

m>   puts line
m> end


Guy Decoux