JavaScript学习笔记（04对象和内置对象-P69-P83）

两种创建对象方式：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
</head>
<body>
    <script>
        /*-----------方式一①-----------*/
        //people = new Object();
        //people.name = "Lee";
        //people.age = 27;
        /*-----------方式一②-----------*/
        //people = { name: "Ski", age: 26 };

        /*-----------方式二(函数定义对象)-----------*/
        function peopleFun(name, age) {
            this.name = name;
            this.age = age;
        }
        people =new peopleFun("Lee.Ski", 26.5);
        people2 = new peopleFun("Lee.SkII", 27);
        document.write("name:" + people.name + ",age:" + people.age);
        document.write("name:" + people2.name + ",age:" + people2.age);
    </script>
</body>
</html>

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内置对象一般会提供已经定义好的属性和方法使用：

示例代码：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
</head>
<body>
    <script>
        var str = "Hello world";
        //document.write(str.length);
        //document.write(str.indexOf("world"));
        //document.write(str.match("world"));//匹配到了则返回world，否则返回null
        //document.write(str.replace("world","Ski"));
        //document.write(str.toLowerCase());
        var str1 = "1,2,3,4,5,6";
        //document.write(str1.split(","));
        var strArr = str1.split(",");
        for (var i = 0; i < strArr.length; i++) {
            document.write(strArr[i]+"<br/>");
        }
    </script>
</body>
</html>

View Code

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
</head>
<body>
    <script>
        var arr1 = ["happy", "time", "bir"];
        var arr2 = [6, 20, 0.3, 4, 5];
        //document.write(arr1.concat(arr2));
        //document.write(arr2.sort((a, b) => a - b));
        //document.write(arr1.push("TT"));
        document.write(arr1.reverse());
    </script>
</body>
</html>

View Code

End