perl code for challenge 81 task 2

1 files changed, 44 insertions, 0 deletions

diff --git a/challenge-081/walt-mankowski/perl/ch-2.pl b/challenge-081/walt-mankowski/perl/ch-2.pl
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+#!/usr/bin/env perl
+use strict;
+use warnings;
+use feature qw(:5.32);
+use experimental qw(signatures);
+
+# You are given file named input.
+#
+# Write a script to find the frequency of all the words.
+#
+# It should print the result as first column of each line should be
+# the frequency of the the word followed by all the words of that
+# frequency arranged in lexicographical order. Also sort the words in
+# the ascending order of frequency.
+#
+# For the sake of this task, please ignore the following in the input file:
+#
+# . " ( ) , 's --
+
+my %h;
+
+while (<>) {
+    chomp;
+    s/--/ /;
+    my @tok = split / /;
+    for my $tok (@tok) {
+        $tok =~ s/[."(),]//g;
+        $tok =~ s/'s$//;
+        $h{$tok}++;
+    }
+}
+
+my $last = 0;
+for my $k (sort { $h{$a} <=> $h{$b} || $a cmp $b } keys %h) {
+    if ($h{$k} != $last) {
+        print "\n" unless $last == 0;
+        print $h{$k};
+        $last = $h{$k};
+    }
+    print " $k";
+}
+
+print "\n";
+