.js

// 這個示例來自You Don't Know JS: https://github.com/getify/You-Dont-Know-JS/blob/2nd-ed/scope-closures/apA.md#var-and-let

function getStudents(data) {
    var studentRecords = [];

    for (let record of data.records) {
        let id = `student-${ record.id }`;
        studentRecords.push({
            id,
            record.name
        });
    }

    return studentRecords;
}