Flyweight Pattern

Author: skillnull

Example/Flyweight-Pattern.js

@@ -1 +1,48 @@
-// 享元模式(Flyweight Pattern)
+// 享元模式(Flyweight Pattern)
+
+// 构建享元对象
+class Modal {
+ constructor (id, gender) {
+ this.gender = gender
+ this.name = `${gender}${id}`
+ }
+}
+
+// 构建享元工厂
+class ModalFactory {
+ // 单例模式
+ static create (id, gender) {
+ if (this[gender]) {
+ return this[gender]
+ }
+ return this[gender] = new Modal(id, gender)
+ }
+}
+
+// 管理外部状态
+class TakeClothersManager {
+ // 添加衣服款式
+ static addClothes (id, gender, clothes) {
+ const modal = ModalFactory.create(id, gender)
+ this[id] = {
+ clothes,
+ modal
+ }
+ }
+
+ // 拍照
+ static takePhoto (id) {
+ const obj = this[id]
+ console.log(`${obj.modal.gender}模${obj.modal.name}穿${obj.clothes}拍了照`)
+ }
+}
+
+for (let i = 0; i < 10; i++) {
+ TakeClothersManager.addClothes(i, '男', `服装${i}`)
+ TakeClothersManager.takePhoto(i)
+}
+
+for (let i = 10; i < 20; i++) {
+ TakeClothersManager.addClothes(i, '女', `服装${i}`)
+ TakeClothersManager.takePhoto(i)
+}

README.md

@@ -73,6 +73,10 @@
 
 > [享元模式(Flyweight Pattern)](/Example/Flyweight-Pattern.js)
 
+ 定义：减少创建对象的数量，以减少内存占用和提高性能。
+ 目的：用共享技术有效地支持大量细粒度的对象。
+ 场景：系统中有大量对象。
+
 ***
 
 ##### 行为模式(Behavioral Pattern)