1. const data = {
    2.   PortLand: "78/50",
    3.   Dublin: "88/52",
    4.   Lima: "58/40"
    5. };
    7. Object.defineProperty(data, "Lima", {
    8.   enumerable: false,
    9.   writable: false
    10. });
    12. console.log(Object.keys(data));
    13. // ["PortLand", "Dublin"]
    15. console.log(Object.getOwnPropertyDescriptors(data));
    16. // PortLand {value: "78/50",writable: true,enumerable: true,configurable: true}
    17. // Dublin {value: "88/52",writable: true,enumerable: true,configurable: true}
    18. // Lima {value: "88/52",writable: true,enumerable: false,configurable: true}
    20. console.log(Object.getOwnPropertyDescriptor(data, "Lima"));
    21. // {value: "58/40",writable: false,enumerable: false,configurable: true}
    23. data.Lima = "59/50";