I use this series of regexp all over the place to clean up lines of
text:

$x=~s/^\s+//g;
$x=~s/\s+$//g;
$x=~s/\s+/ /g;

in that order, and note the final one replace \s+ with a single space.

Basically, it's (1) remove all leading space, (2) remove all trailing
space,
and (3) replace all multi-space with a single space [which, at this
point,
should only occur on interior characters].

Is there a handy way to do this in one regexp?  And, fast?  I've been
using Devel::NYTProf to study code timing and see that some regexp,
especially mine, can be CPU expensive/intensive.

Thanks!
David


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