1、object.keys
for (var key of Object.keys(someObject)) {
console.log(key + ‘: ‘ + someObject[key]);
}
2、使用 Generator 函数将对象重新包装成数组
function* entries(obj) {
for (let key of Object.keys(obj)) {
yield [key, obj[key]];
}
}
for (let [key, value] of entries(obj)) {
console.log(key, ‘->‘, value);
}