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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-1.pl Perl Weekly Challenge 261 Task 1 Element Digit Sum
#=============================================================================
# You are given an array of integers, @ints.
# Write a script to evaluate the absolute difference between element
# and digit sum of the given array.
# Example 1 Input: @ints = (1,2,3,45) Output: 36
# Element Sum: 1 + 2 + 3 + 45 = 51
# Digit Sum: 1 + 2 + 3 + 4 + 5 = 15
# Absolute Difference: | 51 - 15 | = 36
# Example 2 Input: @ints = (1,12,3) Output: 9
# Element Sum: 1 + 12 + 3 = 16
# Digit Sum: 1 + 1 + 2 + 3 = 7
# Absolute Difference: | 16 - 7 | = 9
# Example 3 Input: @ints = (1,2,3,4) Output: 0
# Element Sum: 1 + 2 + 3 + 4 = 10
# Digit Sum: 1 + 2 + 3 + 4 = 10
# Absolute Difference: | 10 - 10 | = 0
# Example 4 Input: @ints = (236, 416, 336, 350) Output: 1296
#=============================================================================
use v5.38;
use builtin qw/true false/; no warnings "experimental::builtin";
use Getopt::Long;
my $Verbose = 0;
my $DoTest = 0;
GetOptions("test" => \$DoTest, "verbose" => \$Verbose);
exit(!runTest()) if $DoTest;
say elementDigitSum(@ARGV);
sub elementDigitSum(@ints)
{
use List::Util qw/sum0/;
local $" = ''; # No space when interpolating array into string
return abs(sum0(@ints) - sum0( split('', "@ints")));
}
sub runTest
{
use Test2::V0;
is( elementDigitSum(1,2,3,45 ), 36, "Example 1");
is( elementDigitSum(1,12,3 ), 9, "Example 2");
is( elementDigitSum(1,2,3,4 ), 0, "Example 3");
is( elementDigitSum(236,416,336,350), 1296, "Example 4");
is( elementDigitSum( ), 0, "Empty list");
done_testing;
}
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