Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change

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.


Replies are listed 'Best First'.
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.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://357757]
and a soft breeze sighs...

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (5)
As of 2018-01-23 22:37 GMT
Find Nodes?
    Voting Booth?
    How did you see in the new year?

    Results (254 votes). Check out past polls.