namespace AdventOfCode.HelperClasses;

public class IntArrayEqualityComparer : IEqualityComparer<int[]>
{
    public bool Equals(int[]? x, int[]? y)
    {
        if (x is null || y is null || x.Length != y.Length) return false;

        return !x.Where((t, i) => t != y[i]).Any();
    }

    public int GetHashCode(int[] obj)
    {
        var result = 17;
        foreach (var t in obj)
        {
            unchecked
            {
                result = result * 23 + t;
            }
        }
        return result;
    }
}