javascript - 如何映射一个对象？

Question

例如，我们可以像这样映射一个数组:

IMGOINGTOBENUMBERS = ["1", "5", "19"];

IM_HAPPY = IMGOINGTOBENUMBERS.map(function(value){
        return +value;
});

console.log(IM_HAPPY);

在 jsfiddle 上:http://jsfiddle.net/87npme9e/1/

但是，普通的 JS 对象又如何呢？我们知道 .map 仅适用于数组。

对象:

IMGOINGTOBENUMBERS = {
    a: "1",
    b: "2"
}

NOT_HAPPY = IMGOINGTOBENUMBERS.map(function(value){
        return +value;
});

console.log(NOT_HAPPY);

在 jsfiddle 上:http://jsfiddle.net/uyzqtpLd/2/

Answer 1

IMGOINGTOBENUMBERS = {
    a: "1",
    b: "2"
}



NOT_HAPPY =  Object.keys(IMGOINGTOBENUMBERS).map(function (key) {return IMGOINGTOBENUMBERS[key]});

console.log(NOT_HAPPY);