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";
-Blake
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