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Deleting undef values from a hash

by liz (Monsignor)
on Dec 14, 2003 at 00:29 UTC ( #314585=perlmeditation: print w/replies, xml ) Need Help??

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  1. or download this
    my %a = (foo => undef);
    print "existed = ".(() = delete $a{foo})."\n";
    existed = 1
    notexisted = 1
  2. or download this
    my %a = (foo => 1, bar => 2, baz => 3);
    $" = ',';
    existed = 1
    notexisted = ,2,3
  3. or download this
    use Devel::Size qw(size total_size);
    c: 16
    d: 16
    e: 29

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[erix]: well, I hope you're right
[Your Mother]: Bill Clinton assaulted and raped repeatedly. Even when it was hinted and finally all but proved, no one cared because his sexism, and racism, and killing was decorous.
[Your Mother]: I think Trump might be better specifically because no one respects him so he won't get his way the way the others did.
[Your Mother]: (I certainly did not vote for him and have been an outspoken critic of his for three decades, by the by.)
[erix]: I'd like Russia threatened a bit more, flattered a bit less
[Your Mother]: The last two regimes killed a million, displaced 10 million, torture prisons, and ruined countries… somehow it's magically bad _now_.
[erix]: what/who are the last two regimes?
[Your Mother]: Bush/Obama. 15 straight years of warfare, torture, etc, etc.
[Your Mother]: All caused by the political fallout of Carter/Reagan when the Afghan chickens came home to roost on 9/11.
[Your Mother]: US foreign policy is toxic and like a broken record.

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