Ext.apply的意义在于什么，而只是在目标上设置值？ [英] What is the point of Ext.apply versus simply setting values on the target?

问题描述

使用Ext.js或sencha，执行以下操作的重点是：

Using Ext.js or sencha, what is the point of doing the following:

Ext.apply(app.views, {
        contactsList: new app.views.ContactsList(),
        contactDetail: new app.views.ContactDetail(),
        contactForm: new app.views.ContactForm()
    });

与此标准相反，javascript：

As opposed to this standard javascript:

app.views.contactsList = new app.views.ContactsList();
app.views.contactDetail = new app.views.ContactDetail();
app.views.contactForm = new app.views.ContactForm();

有什么区别吗？

推荐答案

它主要是作为一个方便的方法，用于接受一个对象作为参数的代码，并且需要合并它。合并对象在JavaScript中是常见的用例，而这种类型的助手由大多数框架实现。 （ $。扩展在jQuery中， Object.extend 在Prototype， Object.append 在MooTools等）

It's mostly there as a convenience method for code that is accepting an object as an argument, and needs to merge it. Merging objects is a common use case in JavaScript, and this type of helper is implemented by most frameworks. ($.extend in jQuery, Object.extend in Prototype, Object.append in MooTools, etc.)

在你的情况下，除了提供一些更可读的代码之外，几乎没有区别。

In your case, there is little difference, other than offering a bit more readable code.

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