lovecoding
/
VIP28


			
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							<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
    // var a = [1,2,3,4]
    // a[0] = 6
    // console.log(a)

    /* var obj = {
      name: 'zs',
      age: 18,
      address: 'harbin'
    }
    console.log(obj) //object  属性名： 属性值 */


    // var obj = new Object()
    // console.log(obj)

    // obj.name = 'lisi'
    // obj.age = 30

    // console.log(obj)


    /* var person = new Array()
    person['age'] = 20
    person['name'] = 'ww'
    console.log(person) */
    //Array 是 特殊的Object


    var arr = new Array()
    var obj = new Object()
    console.log(typeof arr)
    console.log(typeof obj)


  /*  var a = 123;
    var b = '123';
    var c = true;
    var d;
    console.log(typeof d) */


    var a = new Number()
    var b = new String()
    var c = new Boolean()
    /* 尽可能避免这种情况去写  要用合并的方式 */


  </script>
</body>
</html>