Sort the indices by the values of the array elements those indices index: 

my @vals = qw(3 7 5 0 2);
my @index = sort{ $vals[ $a ] <=> $vals[ $b ] } 0 .. $#vals;
print @index;
3 4 0 2 1

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In reply to Re: Sorting by Array values, obtaining indices by BrowserUk
in thread Sorting by Array values, obtaining indices by PetaMem

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