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Adding a couple more tests to your script gives us a clue:
@keys = qw(one two five); unshift @keys,'four'; print "@keys\n"; if (@hash{@keys}) { print "yep\n"; } else { print "nope\n"; } @keys = qw(one two five); push @keys, 'two'; print "@keys\n"; if (@hash{@keys}) { print "yep\n"; } else { print "nope\n"; }
Gives the result:
four one two five yep one two five two nope
It would appear that only the presence of the last key in the array is affecting whether the test returns true or false.

I would suggest a possible solution would be to abuse grep, thus:
if ( grep{ exists( $hash{$_} ) } @keys ) { print "yep\n"; } else { print "nope\n"; }

In reply to Re: Hash slices ? by kilinrax
in thread Hash slices ? by ChOas

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