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Re: Always Follow Up on Warnings

by blakem (Monsignor)
on Feb 07, 2002 at 20:58 UTC ( #143970=note: print w/ replies, xml ) Need Help??

in reply to Always Follow Up on Warnings

I've been known to rant about uninitialized warnings before... Here is one nice idiom for "cleaning" a series of undefined values.
$_ = '' for grep !defined, ($x,$y,$z);
Try the following code with and w/o this clensing line:
#!/usr/bin/perl -wT use strict; my ($x,$y,$z) = (undef,'hello',undef); # undef "clensing" idiom $_ = '' for grep !defined, ($x,$y,$z); print "x='$x' y='$y' z='$z'\n";


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(crazyinsomniac) Re^2: Always Follow Up on Warnings
by crazyinsomniac (Prior) on Feb 08, 2002 at 04:00 UTC
      The problem with $_ ||= '' is that it turns 0's into ''. defined is much less cool, but definitely more effective.


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