Object 对象

常用函数

• 是否包含键 hasOwnProperty

    const object1={};
    object1.property1 = 42;
  
    console.log(object1.hasOwnProperty('property1'));
    // expected output: true
  
    console.log(object1.hasOwnProperty('toString'));
    // expected output: false
  
    console.log(object1.hasOwnProperty('hasOwnProperty'));
    // expected output: false
  

#待整理笔记