Re: Undesirable parent hash keys

See autovivification, a pragma (available from CPAN) that can lexically disable autovivification (the behavior). Here's an example from perlfaq4:

{
    no autovivification;
    my %hash;
    if( exists $hash{key1}{key2}{key3} ) {
        ...;
    }
}
[download]

The faq also suggests a few other techniques.

Dave

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Re^2: Undesirable parent hash keys by sophate (Beadle) on Jan 16, 2013 at 06:20 UTC
thanks for the suggestion. but i'm planning to write my own function to check if a hash key exists without autovivification :-)	[reply]