The weekly challenge 315 - Task 1: Find Words

 1 #!/usr/bin/env perl
 2 # https://theweeklychallenge.org/blog/perl-weekly-challenge-315/#TASK1
 3 #
 4 # Task 1: Find Words
 5 # ==================
 6 #
 7 # You are given a list of words and a character.
 8 #
 9 # Write a script to return the index of word in the list where you find the
10 # given character.
11 #
12 ## Example 1
13 ##
14 ## Input: @list = ("the", "weekly", "challenge")
15 ##        $char = "e"
16 ## Output: (0, 1, 2)
17 #
18 #
19 ## Example 2
20 ##
21 ## Input: @list = ("perl", "raku", "python")
22 ##        $char = "p"
23 ## Output: (0, 2)
24 #
25 #
26 ## Example 3
27 ##
28 ## Input: @list = ("abc", "def", "bbb", "bcd")
29 ##        $char = "b"
30 ## Output: (0, 2, 3)
31 #
32 ############################################################
33 ##
34 ## discussion
35 ##
36 ############################################################
37 #
38 # This one is straight forward: For each word, check if the character
39 # is in it, at keep the index in case the character is found.
40 
41 use v5.36;
42 
43 find_words( ["the", "weekly", "challenge"], "e");
44 find_words( ["perl", "raku", "python"], "p");
45 find_words( ["abc", "def", "bbb", "bcd"], "b");
46 
47 sub find_words( $list, $char ) {
48     say "Input: \@list = (" . join("\", \"", @$list) . ", \$char = '$char'";
49     my @list = @$list;
50     my @result = ();
51     foreach my $i (0..$#list) {
52         push @result, $i if $list[$i] =~ m/$char/;
53     }
54     say "Output: (" . join(", ", @result) . ")";
55 }