英文:
How come I can use a packages method when it says it belongs to a different type?
问题
抱歉，标题写得很糟糕，首先，如果有人在阅读我的问题后能提供一个更好的标题，请提交，我对术语还不太熟悉。
所以，简单的问题：
我正在阅读net/http包中关于如何进行http.Get请求的内容，它说我只需要执行以下操作：
resp, err := http.Get(blah)
好的，很公平，所以我向下滚动列表，看看这个Get函数需要哪些参数，但我在http包的函数下面没有找到它。
所以我继续向下滚动，在type Client下找到了一个Get方法。
那么为什么我不需要先创建一个http.Client，然后向其发出Get请求呢？有点困惑。谢谢任何帮助。
英文:
Sorry for the horrible horrible title, first off if anybody can offer an edit for a better title after reading my question please, submit it, I'm pretty bad with my terminology at the moment.
So, simple question:
Reading through the net/http package on how to make http.Get requests and it says all I have to do is
resp, err := http.Get(blah)
Ok fair enough so scrolling down the list to see what parameters this Get function took, I couldn't find it directly under the functions of the http package
So scrolling down I find a Get method under type Client
So how come I don't have to first http.Client then make my Get request to that? Just a little confused. Thanks for any help.
答案1
得分: 3
这是两种不同版本的方法。在一种情况下，http.Get是在包级别定义的，这类似于C#或Java中的静态方法。在另一种情况下，它具有类型为http.Client的接收器，类似于C#或Java中该类型的实例方法。类型http.Client与您在同一个包中所期望的一样。
包级别的Get方法：
http://golang.org/pkg/net/http/#Get
func Get(url string) (resp *Response, err error)
//^ 没有接收器 = 包级别的方法
//^ 大写的方法名，因此它是“导出的”，类似于public
带有Client接收器的Get方法：
http://golang.org/pkg/net/http/#Client.Get
func (c *Client) Get(url string) (resp *Response, err error)
//^ 这是接收器
英文:
Those are two different versions of the method. In one case; http.Get it's defined at the package level, this works much like a static method in C# or Java. In the other it has a receiver of type http.Client it's more like an instance method on that type in C# or Java. The type http.Client is as you'd expect in the same package.
package level get:
http://golang.org/pkg/net/http/#Get
func Get(url string) (resp *Response, err error)
//^ absence of receiver = package scoped
//^ uppercase method name so it is 'exported' which is about like public
client receiver get:
http://golang.org/pkg/net/http/#Client.Get
func (c *Client) Get(url string) (resp *Response, err error)
//^ this is the receiver
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