最优雅的方式从JQuery $ .each中返回值？

I was wondering if there a more elegant way of returning a value from the function I've pasted below : "getImageURLforPOICategory".

我想知道是否有更优雅的方式从我粘贴的函数返回一个值：“getImageURLforPOICategory”。

As you can see I've used JQuery's "each" function to iterate through an array of objects, when I find the matching value I want to return a result out of the "each" loop and then right out of the function that contains the each loop.

正如你所看到的，我已经使用JQuery的“each”函数来遍历一个对象数组，当我找到匹配的值时，我希望从“each”循环中返回一个结果，然后直接从包含每个循环。

I've used a local variable to "cache" it and then I'm returning that. I'm not entirely sure if this is the best approach? Is there a way of returning the value directly from within the each loop?

我用一个局部变量来“缓存”它，然后我就回来了。我不完全确定这是否是最佳方法？有没有办法直接从每个循环中返回值？

Tracker.getImageURLforPOICategory = function (POICategoryID) {
 var url;
 $.each(Tracker.pointofinterestcategories, function () {
  if (this.id === POICategoryID) {
   url = this.imageurl;
   return;
  }
 }
 );
 return url;
};

Thanks for reading,

谢谢阅读，

Cheers,

干杯，

Duncan

邓肯

2 个解决方案

#1

No, you can't return a value from the .each().

不，你不能从.each（）返回一个值。

If you do a return false; it will stop the loop so it isn't running longer than it needs to, but you'll need to use a variable as you're doing now.

如果你做了返回假;它将停止循环，因此它的运行时间不会超过它所需的时间，但你需要使用现在正在做的变量。

If you don't use $.each(), but instead use a for loop, you'll be able to just:

如果你不使用$ .each（），而是使用for循环，你将能够：

return Tracker.pointofinterestcategories[ i ].imageurl

#2

I'd still use a for loop though.

我仍然会使用for循环。

Tracker.getImageURLforPOICategory = function (POICategoryID) {
    return $.grep(Tracker.pointofinterestcategories, function (item) {
        return item.id === POICategoryID;
    })[0].imageurl;
}

#1