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📜  javacript 计数属性 - Javascript 代码示例

📅  最后修改于: 2022-03-11 15:01:51.940000             🧑  作者: Mango

代码示例1
var person={
    "first_name":"Harry",
    "last_name":"Potter",
    "age":14
};
var personSize = Object.keys(person).length; //gets number of properties (3)