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( [id://3333]=superdoc: print w/replies, xml ) Need Help??
How about this:
use strict; use warnings; my %pred; while (<DATA>) { chomp; my @items = split /-/, $_; my $first = $items[0]; for my $element (@items) { $pred{$element} = $first; } } print "$_ => $pred{$_}\n" for sort keys %pred; __DATA__ 123-234-345-456-567 117-228-339 131 213-324-435 372
Output:
$ perl predecessor.pl 117 => 117 123 => 123 131 => 131 213 => 213 228 => 117 234 => 123 324 => 213 339 => 117 345 => 123 372 => 372 435 => 213 456 => 123 567 => 123

In reply to Re: Looking for the first item in the chain by Laurent_R
in thread Looking for the first item in the chain by vagabonding electron

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