aoc/AdventOfCode/Utility.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace AdventOfCode
{
    public static class Utility
    {
        public static Array DeepClone(this Array arr)
        {
            Array temp = Array.CreateInstance(arr.GetValue(0).GetType(), arr.Length);
            arr.CopyTo(temp, 0);
            return temp;
        }

        public static int ManhattenDistance(int x, int y)
        {
            return Math.Abs(x) + Math.Abs(y);
        }

        public static int[] ToDigitArray(int n)
        {
            var result = new int[NumberOfDigits(n)];
            for (int i = result.Length - 1; i >= 0; i--)
            {
                result[i] = n % 10;
                n /= 10;
            }
            return result;
        }

        private static int NumberOfDigits(int n)
        {
            if (n < 0)
            {
                n = (n == int.MinValue) ? int.MaxValue : -n;
            }

            return n switch
            {
                < 10 => 1,
                < 100 => 2,
                < 1000 => 3,
                < 10000 => 4,
                < 100000 => 5,
                < 1000000 => 6,
                < 10000000 => 7,
                < 100000000 => 8,
                < 1000000000 => 9,
                _ => 10
            };
        }

        public static int[] GetOpcodes(string[] input) =>
            input.First()
                 .Split(',')
                 .Select(x => int.Parse(x))
                 .ToArray();
    }
}