在包的init函数中初始化变量是否可以确保golang应用中的单个实例？

问题描述：

I am writing a Bloom Filter package. Within my package, I want to create an instance of X (non-exported) which I want to exist only as a single instance; no matter how many times my package is imported into an app.

A simple snippet of what I am doing is:

package superduperbloomfilter

var x X

func init() {
    x = X.New(....)
}

Is this correct ?

我正在编写一个Bloom Filter程序包。在我的程序包中，我想创建一个X的实例 code>（非导出），我只想作为一个实例存在；无论我的软件包被导入应用程序多少次。 p>

我正在做的一个简单代码段是： p>


  package superduperbloomfilter 
 
var x X 
 
func init（）  {
x = X.New（....）
} 
  code>  pre> 
 
 这是正确的吗？ p> 
  div>

答

which I want to exist only as a single instance; no matter how many times my package is imported into an app

The spec says an imported package is initialized only once:

If a package has imports, the imported packages are initialized before initializing the package itself. If multiple packages import a package P, P will be initialized only once.

在包的init函数中初始化变量是否可以确保golang应用中的单个实例？

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