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Re: trim leading & trailing whitespace

by graff (Chancellor)
on Mar 30, 2005 at 07:56 UTC ( #443364=note: print w/ replies, xml ) Need Help??


in reply to trim leading & trailing whitespace

Personally, I don't see any need to improve on the old standard:

s/^\s+//; s/\s+$//;
update: After seeing thinker's reply I realized I might have misunderstood the question. If, like he suggests, you mean to remove leading and trailing whitespace from each line of a multi-line string, then I'd change the second line above to:
s/\s*\n\s*/\n/g;


Comment on Re: trim leading & trailing whitespace
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Re^2: trim leading & trailing whitespace
by ady (Deacon) on Mar 30, 2005 at 08:01 UTC
    Probably as good as it gets... Much better than my 1.cut at the job. Tanks a heap! Allan
Re^2: trim leading & trailing whitespace
by ihb (Deacon) on Mar 30, 2005 at 10:09 UTC

    \s matches newlines too, meaning that your pattern will remove empty lines, not just trim them. An alternative is

    s/^[^\S\n]+//gm; s/[^\S\n]+$//gm;

    ihb

    See perltoc if you don't know which perldoc to read!

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