Go中的可选参数? [英] Optional Parameters in Go?

问题描述

Go可以具有可选参数吗?或者我可以只定义两个具有相同名称和不同数量参数的函数吗?

Can Go have optional parameters? Or can I just define two functions with the same name and a different number of arguments?

推荐答案

Go没有可选参数也没有它支持方法重载:

如果简化了方法分派 不需要做类型匹配 出色地.有其他语言的经验 告诉我们，有各种各样的 具有相同名称的方法 偶尔会有不同的签名 有用，但也可能是 在实践中令人困惑和脆弱. 仅按名称匹配并要求 类型的一致性是一个主要问题 简化Go类型的决策 系统.

Method dispatch is simplified if it doesn't need to do type matching as well. Experience with other languages told us that having a variety of methods with the same name but different signatures was occasionally useful but that it could also be confusing and fragile in practice. Matching only by name and requiring consistency in the types was a major simplifying decision in Go's type system.

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