I'd change your code slightly to make your array into an array of hashes. 
@lines = map {
    /(\/\w+\/\w+)\s+\w+\s+\d+\s+\d+\s+(\d+)\s+(\d+)%/;
    {
        volume => $1,
        available => $2,
        free => 100 - $3,
    }
} split /\n/, $space{ $host };

# This is the sorting line!
@lines = sort { $a->{available} <=> $b->{available} } @lines;

push @out, "$host:$_->{volume}    $_->{available}    $_->{free}%" for 
+@lines;

[download]

------
We are the carpenters and bricklayers of the Information Age.

Then there are Damian modules.... *sigh* ... that's not about being less-lazy -- that's about being on some really good drugs -- you know, there is no spoon. - flyingmoose

In reply to Re: sort array by value in it by dragonchild
in thread sort array by value in it by Anonymous Monk

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