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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.


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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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[Corion]: Meh. I think I have now the parts down that I want from a simple Javascript frontend for single-page- applications with a aPerl backend. But it seems that all Javascript templating modules either don't support two-way binding (which would be nice) or ...
[Corion]: ... don't support server-side precompilation (which means the client has to compile all templates to Javascript themselves), or are giant frameworks that expect to do everything (which is not what I want)
[Corion]: I feel that there is a talk somewhere in there, either about the structure and parts, or how I used several parts to get a complete whole.
[Corion]: Maybe I can still find something that is compatible with handlebars.js (which has JS precompilation) but allows for two-way data binding (which is great for the UI)

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