[EMAIL PROTECTED] wrote:
Now that you've had 3 versions (all of them correct), it might be worth a quick explanation, so you don't go away thinking Regex is a "black art".Here is yet another version:
put replaceText(tText, "\s+", tab) into tText
RegEx allows the "unix-style" (or C-style, or Perl-style) quoting of special characters, so "\s" means "(space)" - so the two versions of "\s+" and " +" are effectively the same - choose whichever you find easier to read.
Normally in regex,
"*" (asterisk) means "0 or more of the preceding character (or expression)",
while
"+" (plus) means "1 or more of the preceding character (or expression)".
So, "ab+c" would match "abc" or "abbc" or "abbbc" or ..... etc.
and "ab*c" would match all of those, and would also match "ac" ("a" followed by 0 "b"s followed by "c")
This means that " +" means "one or more spaces" while " *" would mean "zero or more spaces" -
EXCEPT that there's a special case of not matching the empty string due to the "*" (that may not be the technically correct way to describe it, but it's the one that I can understand, and is close enough :-)
So in the special case where the *entire* regular expression is qualified by a "*", it acts like "one or more" instead of "zero or more".
There - simple , eh ? :-) :-)
Seriously, there's a learning curve, but regexes are very powerful; there are lots of tutorials and tools available out on the web (search through Google - I don't have a favourite I'd recommend), including Frederic Rinaldi's rev-based regexbuilder - see http://rinaldicollection.free.fr/
-- Alex Tweedly http://www.tweedly.net
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