Esteemed Monks,

I originally had a boring old loop to iterate through text line by line to pull out relevant bits. It wasn't very Perlish. So I came up with this instead:

#!/usr/bin/env perl

use warnings;
use strict;
use Data::Dump qw/dump/;

$_ = do { local $/; <DATA> };
        
dump { map { /(.+)\n/ => [ /^interesting line (.+?)$/mg ] }
       grep length, split /^Index: /m }
        
__DATA__
Index: file1.txt
Bunch
of
junk
interesting line 1
more junk
interesting line 2
more junk
Index: subdir/file2.txt
interesting line A1
still more junk
interesting line A2
last of the junk

[download]

Output: { "file1.txt" => [1, 2], "subdir/file2.txt" => ["A1", "A2"] }

My question is, is there a way to further shorten the code within the dump { } braces, producing the same result? Whitespace and the literal strings don't matter, nor does the sample code outside the dump { }, nor is efficiency a concern. I feel like I'm missing something obvious.

In reply to Golf challenge: Line-based parsing by v_ryan

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