using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace YKMoon
{
    public static class ListExtension
    {
        public static T PopTop<T>(this List<T> list)
        {
            var result = list[0];
            list.RemoveAt(0);
            return result;
        }
        public static T PopEnd<T>(this List<T> list)
        {
            var result = list[list.Count - 1];
            list.RemoveAt(list.Count - 1);
            return result;
        }
        public static void MoveForward<T>(this List<T> list)
        {
            if (list.Count <=0) {
                return;
            }
            var temp = list.PopTop();
            list.Add(temp);
        }
        public static void MoveBackward<T>(this List<T> list)
        {
            if(list.Count <= 0) {
                return;
            }
            var temp = list.PopEnd();
            list.Insert(0, temp);
        }
    }
}