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Assets/TcgEngine/Scripts/Tools/ListSwap.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace TcgEngine
+{
+    /// <summary>
+    /// Useful optimization tool, let you use arrays without instantiating new ones
+    /// </summary>
+
+    public class ListSwap<T>
+    {
+        public List<T> swap1 = new List<T>();
+        public List<T> swap2 = new List<T>();
+
+        //Return any array
+        public List<T> Get()
+        {
+            swap1.Clear(); //Clear before using
+            return swap1;
+        }
+
+        //Return the OTHER array (because skip is already in use)
+        public List<T> GetOther(List<T> skip)
+        {
+            if (skip == swap1)
+            {
+                swap2.Clear(); //Clear before using
+                return swap2;
+            }
+            swap1.Clear(); //Clear before using
+            return swap1;
+        }
+
+        //Clear both
+        public void Clear()
+        {
+            swap1.Clear();
+            swap2.Clear();
+        }
+    }
+}