The weekly challenge 341 - Task 1: Broken Keyboard

 1 #!/usr/bin/env perl
 2 # https://theweeklychallenge.org/blog/perl-weekly-challenge-341/#TASK1
 3 #
 4 # Task 1: Broken Keyboard
 5 # =======================
 6 #
 7 # You are given a string containing English letters only and also you are given
 8 # broken keys.
 9 #
10 # Write a script to return the total words in the given sentence can be typed
11 # completely.
12 #
13 ## Example 1
14 ##
15 ## Input: $str = 'Hello World', @keys = ('d')
16 ## Output: 1
17 ##
18 ## With broken key 'd', we can only type the word 'Hello'.
19 #
20 #
21 ## Example 2
22 ##
23 ## Input: $str = 'apple banana cherry', @keys = ('a', 'e')
24 ## Output: 0
25 #
26 #
27 ## Example 3
28 ##
29 ## Input: $str = 'Coding is fun', @keys = ()
30 ## Output: 3
31 ##
32 ## No keys broken.
33 #
34 #
35 ## Example 4
36 ##
37 ## Input: $str = 'The Weekly Challenge', @keys = ('a','b')
38 ## Output: 2
39 #
40 #
41 ## Example 5
42 ##
43 ## Input: $str = 'Perl and Python', @keys = ('p')
44 ## Output: 1
45 #
46 ############################################################
47 ##
48 ## discussion
49 ##
50 ############################################################
51 #
52 # Create a list of the words in $str. Then for each of the words,
53 # check if any of the characters in the word is a broken key, we remove
54 # it from the list. Count the remaining words as the result
55 
56 use v5.36;
57 
58 
59 broken_keyboard('Hello World', 'd');
60 broken_keyboard('apple banana cherry', 'a', 'e');
61 broken_keyboard('Coding is fun' );
62 broken_keyboard('The Weekly Challenge', 'a','b');
63 broken_keyboard('Perl and Python', 'p');
64 
65 sub broken_keyboard($str, @keys) {
66     say "Input: '$str', (" . join(", ", @keys) . ")";
67     my @words = split /\s+/, $str;
68     my $count = scalar(@words);
69     OUTER:
70     foreach my $w (@words) {
71         foreach my $key (@keys) {
72             if($w =~ m/$key/i) {
73                 $count--;
74                 next OUTER;
75             }
76         }
77     }
78     say "Output: $count";
79 }