using System;
using System.Linq;

namespace ProGroups
{
	internal static class ArrayExt
	{
		public static void Add<T>(ref T[] array, T val)
		{
			T[] array2 = new T[array.Length + 1];
			Array.Copy(array, array2, array.Length);
			array2[array.Length] = val;
			array = array2;
		}

		public static void AddRange<T>(ref T[] array, T[] values)
		{
			T[] array2 = new T[array.Length + values.Length];
			Array.Copy(array, array2, array.Length);
			Array.Copy(values, 0, array2, array.Length, values.Length);
			array = array2;
		}

		public static void Remove<T>(ref T[] array, T value)
		{
			array = array.Where((T x) => !value.Equals(x)).ToArray();
		}

		public static void Remove<T>(ref T[] array, T[] values)
		{
			array = array.Where((T x) => !values.Contains(x)).ToArray();
		}

		public static void RemoveAt<T>(ref T[] array, int index)
		{
			T[] array2 = new T[array.Length - 1];
			for (int i = 0; i < array.Length; i++)
			{
				if (i != index)
				{
					array2[(i <= index) ? i : (i - 1)] = array[i];
				}
			}
			array = array2;
		}
	}
}