javascript-dasar/50.function-generator.html at master · adiprrassetyo/javascript-dasar · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Function Generator</title>
</head>
<body>
<script>

    function* createNames() {
        yield "Eko";
        yield "Kurniawan";
        yield "Khannedy";
    }

    const names = createNames();
    for (const name of names) {
        console.info(name);
    }

    // lazy
    function* buatGanjil(value) {
        for (let i = 1; i <= value; i++) {
            if (i % 2 === 1) {
                console.info(`Yield ${i}`);
                yield i;
            }
        }
    }

    // eager
    function buatGanjilArray(value) {
        const result = []
        for (let i = 1; i <= value; i++) {
            if (i % 2 === 1) {
                console.info(`Yield ${i}`);
                result.push(i);
            }
        }
        return result;
    }

    const numbers = buatGanjil(100);
    // for (const number of numbers) {
    //     console.info(number);
    // }
    console.info(numbers.next().value);
    console.info(numbers.next().value);
    console.info(numbers.next().value);


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