class Employee {
    constructor(row) {
        this.name = row.name.toUpperCase();
        this.employeeId = parseInt(row.employee_id)
        this.position = row.position.toUpperCase();
    }
}

result = {
    rowCount: 4,
    rows: [
        {name: "John", employee_id: '1', position: "Manager"},
        {name: "Jane", employee_id: '2', position: "Assistant Manager"},
        {name: "Jill", employee_id: '3', position: "Clerk"},
        {name: "Jake", employee_id: '4', position: "Stocker"}
    ]
};

employees = result.rows.map((row) => new Employee(row))