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Re: Re: max value in a hash

by liz (Monsignor)
on May 31, 2004 at 09:31 UTC ( #357757=note: print w/ replies, xml ) Need Help??


in reply to Re: max value in a hash
in thread max value in a hash

This approach will not give the correct result if all of the values are negative:

my %hashName = (a => -1, b => -2, c => -3); my $max = 0; $_ > $max and $max = $_ for values %hashName; print $max; __END__ 0 # expected -1
Of course, if you are sure that all values are positive numeric values, there is no problem. But it is something to keep in mind in general, I think.

Liz


Comment on Re: Re: max value in a hash
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Re:^3 max value in a hash
by Hena (Friar) on Jun 01, 2004 at 09:10 UTC
    And to add in general use of situations like this (for min and max) use 'each' first. Modified version from above.
    my %hashName = (a => -1, b => -2, c => -3); my $max = $hash{each %hashName}; $_ > $max and $max = $_ for values %hashName; print $max;
    And you'll the scalar set as one in the hash in the beginning.

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