Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight

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";


Replies are listed 'Best First'.
(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.


Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://143970]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others wandering the Monastery: (4)
As of 2016-10-22 18:40 GMT
Find Nodes?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?

    Results (297 votes). Check out past polls.