英文:
rand.Seed(SEED) is deprecated, how to use NewRand(NewSeed( ) )?
问题
我正在学习Go语言。在一个例子中，我看到了这行代码：
rand.Seed(SEED)
但是，Go语言的VSCode扩展提示我：
> rand.Seed自Go 1.20版本起已被弃用，并且自Go 1.0版本以来已有替代方法：如果程序调用Seed函数，并期望从全局随机源（使用Int等函数）获得特定序列的结果，当依赖项更改其从全局随机源中消耗的数量时，可能会导致程序出错。为避免此类问题，需要特定结果序列的程序应使用NewRand(NewSource(seed))来获取其他包无法访问的随机生成器。（SA1019）
我不明白如何使用建议中的NewRand(NewSource(seed))。
我找到了关于NewSource的文档，链接为：https://pkg.go.dev/math/rand#NewSource
但是没有关于NewRand函数的文档。
请问，rand.Seed(SEED)的新推荐等效方法是什么？
英文:
I am studying go just now.
I an example I've this line
rand.Seed(SEED)
But the vscode extension about go is telling me
> rand.Seed has been deprecated since Go 1.20 and an alternative has been available since Go 1.0: Programs that call Seed and then expect a specific sequence of results from the global random source (using functions such as Int) can be broken when a dependency changes how much it consumes from the global random source. To avoid such breakages, programs that need a specific result sequence should use NewRand(NewSource(seed)) to obtain a random generator that other packages cannot access. (SA1019)
I cannot understand how to use NewRand(NewSource(seed)) as suggested.
I found doc about NewSource https://pkg.go.dev/math/rand#NewSource
But there is not doc about a NewRand function
What is the new reccomended equivalent of rand.Seed(SEED) ?
答案1
得分: 29
Go 1.20 Seed文档中有一个拼写错误。请按照最新文档和Go 1.20发布说明中的描述使用rand.New(rand.NewSource(seed))。
创建随机源并使用源上的方法，而不是调用包函数：
r := rand.New(rand.NewSource(seed))
fmt.Println(r.Uint64())
fmt.Println(r.Uint64())
英文:
The Go 1.20 Seed documentation has a typo. Use rand.New(rand.NewSource(seed)) as described in the latest documentation and the Go 1.20 release notes.
Create the random source and use methods on the source instead of calling the package functions:
r := rand.New(rand.NewSource(seed))
fmt.Println(r.Uint64())
fmt.Println(r.Uint64())
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