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#!/usr/bin/perl ... map( [ $_, $_->[4] ], @$ary2 ); use Data::Dump 'dd'; dd \@sorted;
[ [2, 2, 2, 2, "2018-01-25", 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], ]