searayman searayman - 3 months ago 10
Perl Question

Sort Perl hash from largest to smallest

I am looking at an example found here: http://perlmeme.org/tutorials/sort_function.html

And it gives this code to sort a hash based on each key's value:

# Using <=> instead of cmp because of the numbers
foreach my $fruit (sort {$data{$a} <=> $data{$b}} keys %data) {
print $fruit . ": " . $data{$fruit} . "\n";
}


This code I do not fully understand, but when I experiment with it, it sorts from lowest to highest. How can I flip it to sort from highest to lowest?

Answer

Swap $a and $b:

foreach my $fruit (sort {$data{$b} <=> $data{$a}} keys %data) {
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