使用异步结果（array.filter）

Question

所以我有一个数组，我需要从undefined值中过滤它然后使用它（请参阅下面的示例！）因此，由于filter方法是异步的，所以无法保证结果数组被过滤到I＆ ＃39; m记录它！

//Here I need to filter the results from undefined!
results = results.filter(function (item) {
    return item !== undefined;
});
//But since the filter method is async, it is not guaranteed that results is filtered here yet!
console.log(results)