#!/usr/bin/perl

# https://perlmonks.org/?node_id=1219394

use strict;
use warnings;
use Data::Dump 'dd';

my %phrase_counts = (
          'rendition' => '3',
          'automation' => '2',
          'saturation' => '3',
          'mass creation' => 2,
          'automation technology' => 2,
          'automation technology process' => 3,
          'technology process' => 5,
          'automation process' => 2,
          'process automation' => 2,
);

dd 'before', \%phrase_counts;

my $words = '';

for my $w ( sort { length $b <=> length $a } keys %phrase_counts )
  {
  if( $words =~ join '.*?', map "\\b$_\\b", split ' ', $w )
    {
    delete $phrase_counts{$w};
    }
  else
    {
    $words .= "$w\n";
    }
  }

dd 'after', \%phrase_counts;

[download]

In reply to Re: retain longest multi words units from hash by tybalt89
in thread retain longest multi words units from hash by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.