10.FlppyBird-创建障碍

lib/flppyBirdLib.js

@@ -184,3 +184,27 @@ function loadImgAsync(src) {
 		img.src = src;
 	});
 }
+
+/**
+ * 一个简单的通用对象池
+ */
+class ObjectPool {
+
+	static objs = {};
+
+	static put(name, obj) {
+		const pool = ObjectPool.objs[name] || (ObjectPool.objs[name] = []);
+
+		pool.push(obj);
+	}
+
+	static get(name) {
+		const pool = ObjectPool.objs[name] || (ObjectPool.objs[name] = []);
+
+		if (pool.length <= 0) {
+			return null;
+		}
+
+		return pool.shift();
+	}
+}