Golang通用参数 [英] Golang generic param

问题描述

是否有一种方法可以通过通用参数使用一个函数，而不是如下所示具有两个函数?我有Java背景，正在寻找一种具有这样的功能

Is there a way to use one function using a generic parameter instead of having two functions as shown below? I have Java background and looking for a way to have something like this

//Java
public Something doSomething(T val)

//Go
func (l *myclass) DoSomethingString(value string) error {
    test := []byte[value]
    // do something with test
    return err
}
func (l *myclass) DoSomethingInt(value int64) error {
    test := []byte[value]
    // do something with test
    return err
}

推荐答案

不幸的是，Go没有泛型，也没有重载.您可以使用类型为 interface {} 的参数并将其切换为实型:

Unfortunately, Go has no generics and no overloading. You can use a parameter of type interface{} and switch over it's real type:

func (*Test) DoSomething(p interface{}) {
    switch v := p.(type) {
        case int64:
            fmt.Println("Got an int:", v)
        case string:
            fmt.Println("Got a string", v)
        default:
            fmt.Println("Got something unexpected")
    }
}

在操场上链接

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