little refactor

Assets/IsoTools/Scripts/Internal/IsoAssocList.cs

@@ -42,7 +42,7 @@ namespace IsoTools.Internal {
 				return false;
 			}
 			_dict.Add(item, _list.Count);
-			_list.Push(item);
+			_list.Add(item);
 			return true;
 		}
 
@@ -60,6 +60,12 @@ namespace IsoTools.Internal {
 			return false;
 		}
 
+		public T Pop() {
+			var item = _list.Pop();
+			_dict.Remove(item);
+			return item;
+		}
+
 		public void Clear() {
 			_list.Clear();
 			_dict.Clear();

Assets/IsoTools/Scripts/Internal/IsoList.cs

@@ -26,7 +26,7 @@ namespace IsoTools.Internal {
 			}
 		}
 
-		public void Push(T value) {
+		public void Add(T value) {
 			if ( _size == _data.Length ) {
 				var new_capacity = _size == 0
 					? _defaultCapacity : _size * 2;

Assets/IsoTools/Scripts/Internal/IsoPool.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace IsoTools.Internal {
+namespace IsoTools.Internal {
 	public interface IsoIPool<T> {
 		T Take();
 		void Release(T item);
@@ -12,7 +10,7 @@ namespace IsoTools.Internal {
 		public IsoPool(int capacity) {
 			_items = new IsoList<T>(capacity);
 			for ( var i = 0; i < capacity; ++i ) {
-				_items.Push(CreateItem());
+				_items.Add(CreateItem());
 			}
 		}
 
@@ -23,11 +21,8 @@ namespace IsoTools.Internal {
 		}
 
 		public void Release(T item) {
-			if ( item == null ) {
-				throw new ArgumentNullException("item");
-			}
 			CleanUpItem(item);
-			_items.Push(item);
+			_items.Add(item);
 		}
 
 		public abstract T CreateItem();

Assets/IsoTools/Scripts/IsoWorld.cs

@@ -562,7 +562,7 @@ namespace IsoTools {
 					_sectors.Capacity = count;
 				}
 				while ( _sectors.Count < _sectors.Capacity ) {
-					_sectors.Push(new Sector());
+					_sectors.Add(new Sector());
 				}
 			}
 			for ( int i = 0, e = _sectors.Count; i < e; ++i ) {
@@ -581,7 +581,7 @@ namespace IsoTools {
 				for ( var x = min.x; x < max.x; ++x ) {
 					var sector = FindSector(x, y);
 					if ( sector != null ) {
-						sector.objects.Push(iso_object);
+						sector.objects.Add(iso_object);
 					}
 				}}
 			}