罗短跑，数组和集合的区别 [英] Lo-Dash, difference between array and collection

问题描述

在罗短跑文档一瞥表明API落入到分类：

A glance at the Lo-Dash docs shows that the API falls in to categories of:

1. 阵列，


2. 链接，


3. 集合，


4. 功能，


5. 对象，


6. 实用程序，


7. 方法，


8. 和属性

到阵列API更详细的研究表明，适用于阵列提供大约30个不同的方法。

A more detailed look in to the Arrays API shows approximately 30 different methods available that are applicable to arrays.

集合API具有比阵列的API几多个方法，并且它们不共享相同的方法。

The Collections API has a few more methods than the Arrays API, and they do not share the same methods.

内集合API，一个集合被描述为被迭代的对象，并可能是一个数组：

Within the Collections API, a collection is described as an object that is iterated, and may be an array:

集合（阵列|对象|字符串）：集合遍历

collection (Array|Object|string): The collection to iterate over.

另外，有趣的是，有一个集合API方法 _的toArray 从集合返回一个数组：

Also, interestingly, there's a Collections API method _.toArray that returns an array from a collection:

参数

集合（阵列|对象|字符串）：集合进行转换。返回

collection (Array|Object|string): The collection to convert. Returns

（阵列）：返回新的转换阵列

(Array): Returns the new converted array.

会有人碰巧知道罗短跑API中的数组和集合之间的正式区别？我是presumption下，这是由于Backbone.js的差异，但是，现在我质疑我的推理为此，因为方法可能是其他地方。先谢谢了。

Would anyone happen to know a formal difference between an array and collection in the Lo-Dash API? I was under the presumption it was a difference due to Backbone.js, however, am now questioning my reasoning to that end, since the methods may be available elsewhere. Thanks in advance.

推荐答案

这是一个好主意，看看更详细的 Underscore.js文档，从中这种区别的。它指出：

It's a good idea to look at the more elaborate Underscore.js documentation, from which this distinction is derived. It states:

收集功能的数组，对象，如参数，NodeList的和类似的类似数组的对象。但它的工作原理是鸭打字，所以要避免传递对象以数字长度属性。

Collection functions work on arrays, objects, and array-like objects such as arguments, NodeList and similar. But it works by duck-typing, so avoid passing objects with a numeric length property.

基本上，集合是实现某种迭代界面的东西，他们在内部使用同一个迭代法（虽然Lodash源比下划线多一点令人费解）。所有收集方法做的工作都在数组和对象（和一些更多的东西可迭代），而阵列方法只应在阵列中使用（或也许一切与。长度和数字指标），而对象方法上的任何对象。

Basically, "collections" are things that implement some kind of "iterable" interface, and they internally use the same iteration method (though Lodash source is a bit more convoluted than Underscore). All the "collection methods" do work both on arrays and objects (and a few more iterable things), while the array methods should only be used on arrays (or maybe everything with .length and numeric indices), and the object methods work on any objects.

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