#!/usr/bin/perl
# https://perlmonks.org/?node_id=1222256
use strict;
use warnings;
my $ary1 = [
[ 1,1,1,1,1,'2018-03-01', 'src1', 1,1,1,1 ],
[ 1,1,1,1,1,'2018-02-15', 'src1', 1,1,1,1 ],
[ 1,1,1,1,1,'2018-04-11', 'src1', 1,1,1,1 ],
[ 1,1,1,1,1,'2018-03-11', 'src1', 1,1,1,1 ],
];
my $ary2 = [
[ 2,2,2,2,'2018-03-02', 2, 'src2', 2,2,2,2 ],
[ 2,2,2,2,'2018-01-25', 2, 'src2', 2,2,2,2 ],
[ 2,2,2,2,'2018-04-22', 2, 'src2', 2,2,2,2 ],
[ 2,2,2,2,'2018-03-22', 2, 'src2', 2,2,2,2 ],
];
my @sorted = map $_->[0],
sort { $a->[1] cmp $b->[1] }
map( [ $_, $_->[5] ], @$ary1 ),
map( [ $_, $_->[4] ], @$ary2 );
use Data::Dump 'dd'; dd \@sorted;
Outputs
[
[2, 2, 2, 2, "2018-01-25", 2, "src2", 2, 2, 2, 2],
[1, 1, 1, 1, 1, "2018-02-15", "src1", 1, 1, 1, 1],
[1, 1, 1, 1, 1, "2018-03-01", "src1", 1, 1, 1, 1],
[2, 2, 2, 2, "2018-03-02", 2, "src2", 2, 2, 2, 2],
[1, 1, 1, 1, 1, "2018-03-11", "src1", 1, 1, 1, 1],
[2, 2, 2, 2, "2018-03-22", 2, "src2", 2, 2, 2, 2],
[1, 1, 1, 1, 1, "2018-04-11", "src1", 1, 1, 1, 1],
[2, 2, 2, 2, "2018-04-22", 2, "src2", 2, 2, 2, 2],
]
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