This

>  grep { $args{$_ } } keys %ta;

Will also delete all false values like 0 or "" . You rather want to test on definedness and not truth

This keys on a slice

>   keys %args{'profile', 'user', 'password'};

Is over complicated and doesn't make sense.

You obviously just want the list of keys directly

'profile', 'user', 'password'

But I concur with choroba that using exists right from the beginning is the cleanest way, since undef could be a legal value.

edit

There is - unfortunately - no "slice when exists" operator in Perl.

Otherwise (ab)using hashes for set operations like intersections would be trivial.

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re: Consise way to filter out keys with undef values from a hash slice? by LanX
in thread Consise way to filter out keys with undef values from a hash slice? by nysus

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