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#!/usr/bin/perl -s
use v5.24;
use Test2::V0;
use experimental 'signatures';
our ($tests, $examples);
run_tests() if $tests || $examples; # does not return
die <<EOS unless @ARGV == 2;
usage: $0 [-examples] [-tests] [C STR]
-examples
run the examples from the challenge
-tests
run some tests
C
a single character (or string)
STR
a string
EOS
### Input and Output
say pct_sub(@ARGV);
### Implementation
#
# For details see:
# https://github.sommrey.de/the-bears-den/2024/06/14/ch-273.html#task-1
sub pct_sub ($sub, $str) {
return int .5 + 100 * (() = /\Q$sub/g) * length($sub) / length for $str;
}
### Examples and tests
sub run_tests {
SKIP: {
skip "examples" unless $examples;
is pct_sub("e", "perl"), 25, 'example 1';
is pct_sub("a", "java"), 50, 'example 2';
is pct_sub("m", "python"), 0, 'example 3';
is pct_sub("a", "ada"), 67, 'example 4';
is pct_sub("l", "ballerina"), 22, 'example 5';
is pct_sub("k", "analitik"), 13, 'example 6';
}
SKIP: {
skip "tests" unless $tests;
is pct_sub("12", "123"), 67, 'not a single character';
is pct_sub('.$', '.$--.$'), 67, 'meta characters';
}
done_testing;
exit;
}
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