1. 動态添加對象的屬性和方法
2. 一次性建立對象
3. 使用内建的構造函數
literal notation的優點：
1）it’s shorter to type
2）it emphasizes that objects are simply mutable hashes and not something that needs to be baked from a “recipe” (from a class)
3) faster
技術改變世界
1. 動态添加對象的屬性和方法
2. 一次性建立對象
3. 使用内建的構造函數
literal notation的優點：
1）it’s shorter to type
2）it emphasizes that objects are simply mutable hashes and not something that needs to be baked from a “recipe” (from a class)
3) faster
技術改變世界
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