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@@ -0,0 +1,59 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+</head>
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+<body>
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+ <script>
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+ var obj = {
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+ name:"张三",
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+ age:"",
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+ sayName:function(){
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+ console.log(this.name)
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+ }
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+ }
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+ // delete console.log
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+ delete obj.age;
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+ console.log(obj);
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+
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+
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+ // var arr = new Array(1,2,3);
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+ // console.log(arr);
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+ // var str = "hello";
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+ // delete str;
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+ // console.log(str)
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+ // var arr = new Array(5);
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+ var arr = new Array;
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+ console.log(arr);
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+
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+
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+ // var str2 = new String("hello world");
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+ // console.log(str2 + "你好")
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+
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+
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+ // console.log(obj.name);
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+
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+ // var arr = [1,2,3,4];
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+ // console.log(arr.length);
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+
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+ // var todyObj = new Date();
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+
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+ // var obj2 = new Object({a:'1',b:'hello'});
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+ // console.log(obj2.b);
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+
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+ // var rightNow = new Date();
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+ // console.log(rightNow.getDay());
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+ // console.log(rightNow.getDate());
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+
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+ // var str10 = "hello world";
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+ // console.log(str10[1]);
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+ // console.log(str10.charAt(1));
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+ // var s = "1234567890";
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+ // s = s.substr(5,2);
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+ // console.log(s);
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+
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+ </script>
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+</body>
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+</html>
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