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How do I sort a hash by its values?

by Anonymous Monk
on Feb 22, 2000 at 15:14 UTC ( #3860=perlquestion: print w/replies, xml ) Need Help??
Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

I have a hash containing error-codes from a web-server log, and a number as values. I would like to print them out sorted by the number. How do I do that?

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Re: How do I sort a hash by its values?
by btrott (Parson) on Feb 22, 2000 at 22:38 UTC
    Read perlman:perlfaq4, "How do I sort a hash (optionally by value instead of key)?"

    But in short:

    @keys = sort { $hash{$b} <=> $hash{$a} } keys %hash;
    @keys now contains the sorted list of keys.

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[atcroft]: .oO(Then there is the effect if a site changes their timezone, such as when the International Date Line was moved by the purchase of Alaska by the US from Russia in 1867, or several places (I cannot recall off-hand) that moved from one side of the Date
[atcroft]: Line to the other recently....)
[atcroft]: .oO(Then again, you also have to be careful if you had it to the database, and be aware of any assumptions it makes (such as SQLite assuming Gregorian calendar and a day of exactly 86400 seconds)...)

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