js_practice/3_object_4.html at master · 200wonman/js_practice · GitHub

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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>

        // Object
        function MakePerson (name, age) {
            this.name = name;
            this.age = age;
        }
        const juye = new MakePerson('juye',30);


        // for..in -> for ( key in obj ) {}
        for (key in juye) {
            console.log(key); // 콘솔결과 name / age가 한줄씩 뜸
        }


        console.log('----------------------------------------')


        // for..of -> ( value of iterable)
        const array = [1,2,4,5];

        // 일반적 방법
        for(let i=0; i<array.length; i++){
            console.log(array[i]);
        }

        // for..of 방법
        for (value of array) {
            console.log(value);
        }


    </script>

</body>
</html>