为什么JavaScript将源代码文本传递到参数中？

控制台日志：

   [Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object]
     (index):104

   function (newFeedItems) {
       console.log(feedItems);
   } (index):113

   Uncaught TypeError: Object function (newFeedItems) {
      console.log(feedItems);
   } has no method 'sort' 

这是从哪里来的

function (newFeedItems) {
    console.log(feedItems);
} (index):113

当它应该是：

[Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object, Object]

看看函数

fetchfeed（）

和

processLatestFeed（）

。问题始于

processLatestFeed（函数（newFeedItems）{

---

您正在将函数作为第一个参数传递给

processLatestFeed

：

processLatestFeed(function(newFeedItems) {
  console.log(feedItems);
});

但您将该函数定义为接受数组作为第一个参数，接受回调作为第二个参数：

function processLatestFeed(newFeedItems, callback) {
    console.log(newFeedItems); // <- this logs the function source
    // ...
}

---

你能进一步描述一下你的问题吗？我想我不太明白你想说什么say@ZachSaucier查看newFeedItems以及它是如何记录到控制台的，您可以看到它如何正确地显示它是一个对象数组[Object，Object，Object…]，但是当newFeedItems被传递到processLatestFeed（函数（newFeedItems）…它似乎不是作为一个对象数组传入的，而是作为源代码本身传入的（请参阅控制台日志的第二部分）。不确定我是否理解，但更改如下：processLatestFeed（newFeedItems，function（）{console.log（feedItems）；}）；我是个白痴！整天都在玩JavaScript——想想这是我休息一下的暗示：）是的，这通常会有帮助：）

function processLatestFeed(newFeedItems, callback) {
    console.log(newFeedItems); // <- this logs the function source
    // ...
}

processLatestFeed(newFeedItems, function() {
  // you are not passing an arguments to the callback
});