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Postings from April 2002
> what do these few matches with?
Please don't ask homework questions on the list, unless you
need something particular explained. Especially with regex's,
as the best way to describe the complete set of matching
strings is another regex (or more likely, the same one).
> m/(ham|cheese|Big Mac) burgur/
Definately not McDonald's food list - the typo in "burger" doesn't help! Anyway, it should match:
ham burger
cheese burger
and:
flame grilled gutbusting mega jumbo Big Mac burger with added fat and mechanically recovered GM
meat
> m/(fred){3}+d/
"fred" in a string repeated a multiple of 3 (not including none), followed by a "d"
> tr/A-Z/a-z/
perldoc -f lc
> s!(http|ftp)://((\w+\.)*\w+)((/\w+)*/?)!$2!
I'm not going to even bother with this one... you just don't parse these yourself, unless you
adhere to the specfication or don't mind a hack. This will fail on legitimate addresses, I think
and should be avoided in favour of proper URL/URI parsers.
Jonathan Paton
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