From: Roger Lipscombe <rlipscombe@...>
Date: 2001-07-27T20:30:29+09:00
Subject: [ruby-talk:18622] Regex problems

I'm trying to do some regex replacement in strings:

def assertStringsEqual(actual, expected)
 if not (actual == expected)
  raise "Assertion failed: actual: '" + actual + "', expected: '" + expected
+ "'"
 end
end

# Match things in MixedCase
def substituteRegex(string)
 re = /\b([A-Z][a-z]+){2,}\b/

 string.gsub(re) {
  "prolog:" + $1 + ":middle:" + $1 + ":epilog"
 }
end

assertStringsEqual(substituteRegex("ThisShouldWork"),
                    "prolog:ThisShouldWork:middle:ThisShouldWork:epilog")
assertStringsEqual(substituteRegex("THISSHOULDNOTWORK"),
                    "THISSHOULDNOTWORK")

And it's not working.  I get the following:

./test.rb:301:in `assertStringsEqual': Assertion failed: actual:
'prolog:Work:middle:Work:epilog', expected:
'prolog:ThisShouldWork:middle:ThisShouldWork:epilog' (RuntimeError)

Essentially, the {2,} doesn't seem to be working, and it's grabbing the last
piece that matches.

Ideas?

Cheers,
Roger.