in reply to Sorting files by 3 numbers in the name

Since perl's sort is now stable, I offer this in loving memory and tribute to IBM card sorters :) 

#!/usr/bin/perl

# http://perlmonks.org/?node_id=1191282

use strict;
use warnings;
use Data::Dumper;

my @files = qw( 
    ASR0005336_8950_ETSTexas_EOC052017P_0517_Candidate_RRD_178904_01_0
+2_Spr17_Initial_201705040952_41044.zip
    ASR0004520_8960_ETSTexas_EOC052017P_0517_Candidate_RRD_178901_04_0
+4_Spr17_Initial_201705040952_41045.zip 
    ASR0004994_8958_ETSTexas_EOC052017P_0517_Candidate_RRD_178901_02_0
+4_Spr17_Initial_201705040951_41043.zip
    ASR0005336_8950_ETSTexas_EOC052017P_0517_Candidate_RRD_178904_02_0
+2_Spr17_Initial_201705040952_41044.zip
    ASR0005154_8957_ETSTexas_EOC052017P_0517_Candidate_RRD_178901_01_0
+4_Spr17_Initial_201705040951_41042.zip
    ASR0005336_8959_ETSTexas_EOC052017P_0517_Candidate_RRD_178901_03_0
+4_Spr17_Initial_201705040952_41044.zip
    ASR0005336_8972_ETSTexas_EOC052017P_0517_Candidate_RRD_178902_01_0
+1_Spr17_Initial_201705040952_41044.zip
    );

# sort by pseudo-column with stable sort -- IBM card sorters forever !
+!!

my @returnfiles = 
  sort { (split /_/, $a)[1] <=> (split /_/, $b)[1] }
  sort { (split /_/, $a)[7] <=> (split /_/, $b)[7] }
  sort { (split /_/, $a)[8] <=> (split /_/, $b)[8] }
  sort { (split /_/, $a)[9] <=> (split /_/, $b)[9] }
  @files;

print Dumper \@returnfiles;

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Replies are listed 'Best First'.
Re^2: Sorting files by 3 numbers in the name
by tobyink (Canon) on May 26, 2017 at 14:54 UTC

    If you've got hundreds of filenames, I think you'll find my way runs significantly faster — it only needs to match each filename against the regexp once. Yours will do it dozens of times per filename.

[reply]

      Hey, don't besmirch the memory of IBM card sorters.

      Without them, where would 1950's science fiction movies be?

[reply]
Re^2: Sorting files by 3 numbers in the name
by LanX (Saint) on May 26, 2017 at 15:36 UTC
[reply]

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