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Re^2: How to sort the data in Array which has format MMYY

by Anonymous Monk
on Jul 02, 2013 at 15:04 UTC ( #1042041=note: print w/replies, xml ) Need Help??


in reply to Re: How to sort the data in Array which has format MMYY
in thread How to sort the data in Array which has format MMYY

Maybe when replying to somebody who already says is new to perl, it would be nice to actually test your code.

Problems:

1) don't pass $a and $b to a sort sub, since they are special variables

2) don't treat a hash like a hashref, it just won't work

3) you don't need the return either

This does work:
use strict; use warnings; my %month_sort = ( 'JAN' => 1, 'FEB' => 2, 'MAR' => 3, 'APR' => 4, 'MAY' => 5, 'JUN' => 6, 'JUL' => 7, 'AUG' => 8, 'SEP' => 9, 'OCT' => 10, 'NOV' => 11, 'DEC' => 12 ); sub sort_cmp { ( substr($a, 3, 2) cmp substr($b, 3, 2) ) || ( $month_sort{substr($a, 0, 3)} <=> $month_sort{substr($b, 0, 3)} ); } my (@months) = qw(APR12 MAR13 APR11 MAR12 FEB13 APR13); @months = ( sort sort_cmp @months); print "@months \n";

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