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Re^2: scanning hash

by davido (Archbishop)
on Aug 01, 2004 at 09:20 UTC ( #379039=note: print w/ replies, xml ) Need Help??

in reply to Re: scanning hash
in thread scanning hash

I love that solution. Here it is in the form of a sub. Pass a reference to the hash into the sub. A return value of true means all values are equal. A value of false means there are some not-equal values.

use strict; use warnings; my %goodhash = qw/one 1 two 1 three 1 four 1 five 1/; my %badhash = qw/one 1 two 2 three 2 four 2 five 2/; foreach my $testhash ( \%goodhash, \%badhash ) { print SameVals( $testhash ) ? "Good.\n" : "Bad.\n"; } sub SameVals { return keys( %{ { reverse %{ $_[0] } } } ) <= 1; }

Note that this adds a hashref dereference. That's the  %{ $_[0] } part.


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