Using Perl, how can I sort an array using the value of a number inside each array element?

Question

Let\'s say I have an array, @theArr, which holds 1,000 or so elements such as the following:

01  \'12 16 sj.1012804p1012831.93.gz\'
02  \'12 16 sj.1012832p10         


        

Answer 1

Looks like you need a Schwartzian Transform:

#!/usr/bin/perl

use strict;
use warnings;

my @a = ;

print 
    map  { $_->[1] }                #get the original value back
    sort { $a->[0] <=> $b->[0] }    #sort arrayrefs numerically on the sort value
    map  { /sj\.(.*?)p/; [$1, $_] } #build arrayref of the sort value and orig
    @a;

__DATA__
12 16 sj.1012804p1012831.93.gz
12 16 sj.1012832p1012859.94.gz
12 16 sj.1012860p1012887.95.gz
12 16 sj.1012888p1012915.96.gz
12 16 sj.1012916p1012943.97.gz
12 16 sj.875352p875407.01.gz
12 16 sj.875408p875435.02.gz
12 16 sj.875436p875535.03.gz
12 16 sj.875536p875575.04.gz
12 16 sj.875576p875603.05.gz
12 16 sj.875604p875631.06.gz
12 16 sj.875632p875659.07.gz
12 16 sj.875660p875687.08.gz
12 16 sj.875688p875715.09.gz
12 16 sj.875716p875743.10.gz