lovecoding
/
VIP24


			
							12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455
							<!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 = [0,1,2,3,4]
    // a[0] = 6
    // console.log(a)

    // var obj = {
    //   name: 'zs',
    //   age: 18,
    //   address:'nangang'
    // }
    // console.log(obj)

    // var obj = new Object()
    
    // obj.name = 'lisi'
    // obj.age = '20'
    // console.log(obj)


    // var person = new Array()
    // person['age'] = 30 //注意，中括号里面的下标是一个字符串，所以需要使用引号
    // person['name'] = 'ww'
    // console.log(person)

    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)
  
    引用数据类型: obj

    var x = new String()
    var y = new Number()
    var z = new Boolean()
    //请避免字符串、数值或逻辑对象。他们会增加代码的复杂性并降低执行速度。


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