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#!/usr/bin/env perl
# vim:set ts=4 sw=4 sts=4 et ai wm=0 nu:
#=============================================================================
# Copyright (c) 2024, Bob Lied
#=============================================================================
# ch-2.pl Perl Weekly Challenge 280 Task 2 Count Asterisks
#=============================================================================
# You are given a string, $str, where every two consecutive vertical bars
# are grouped into a pair.
# Write a script to return the number of asterisks, *, excluding any
# between each pair of vertical bars.
# Example 1 Input: $str = "p|*e*rl|w**e|*ekly|"
# Ouput: 2
# The characters we are looking here are "p" and "w**e".
# Example 2 Input: $str = "perl"
# Ouput: 0
# Example 3 Input: $str = "th|ewe|e**|k|l***ych|alleng|e"
# Ouput: 5
# The characters we are looking here are "th", "e**", "l***ych" and "e".
#=============================================================================
use v5.40;
use Getopt::Long;
my $Verbose = false;
my $DoTest = false;
my $Benchmark = 0;
GetOptions("test" => \$DoTest, "verbose" => \$Verbose, "benchmark:i" => \$Benchmark);
exit(!runTest()) if $DoTest;
exit( runBenchmark($Benchmark) ) if $Benchmark;
say count2($_) for @ARGV;
sub count($str)
{
my @t = split(/\|/, $str);
my $first = join "", @t[ map { $_ * 2 } 0 .. int($#t/2) ];
return $first =~ tr/*//d;
}
sub count2($str)
{
my @t = split(/\|/, $str);
my $n = 0;
while ( defined(my $s = shift @t) )
{
$n += $s =~ tr/*//d;
shift @t;
}
return $n;
}
sub runTest
{
use Test2::V0;
is( count("p|*e*rl|w**e|*ekly|"), 2, "Example 1");
is( count("perl"), 0, "Example 2");
is( count("th|ewe|e**|k|l***ych|alleng|e"), 5, "Example 3");
is( count2("p|*e*rl|w**e|*ekly|"), 2, "Example 1");
is( count2("perl"), 0, "Example 2");
is( count2("th|ewe|e**|k|l***ych|alleng|e"), 5, "Example 3");
done_testing;
}
sub runBenchmark($repeat)
{
use Benchmark qw/cmpthese/;
cmpthese($repeat, {
label => sub { },
});
}
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