Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation

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:

Replies are listed 'Best First'.
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;


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

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

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://443364]
and all is quiet...

How do I use this? | Other CB clients
Other Users?
Others making s'mores by the fire in the courtyard of the Monastery: (2)
As of 2017-12-17 10:24 GMT
Find Nodes?
    Voting Booth?
    What programming language do you hate the most?

    Results (463 votes). Check out past polls.