可选绑定的命名约定 [英] Naming convention for optional binding

问题描述

最初使我不愿在代码中加入太多可选绑定的一件事是添加了更多的变量名.例如，我通常会这样写:

One thing that originally discouraged me from incorporating too much optional binding in my code was the addition of more variable names. For example, I'd generally write:

if bananasInBarrel != nil{
  print("We have \(bananasInBarrel!) bananas in the barrel.")
}

因为替代方法似乎有些混乱:

Because the alternative seemed to get a bit messy:

if let safeBananas = bananasInBarrel{
  print("We have \(safeBananas) bananas in the barrel.")
}

那是很多香蕉.我已经看到人们使用像b这样的新变量名(在更大的代码块中可能很难阅读)，但是我想知道变量名样式是否有一个公认的标准与可选绑定一起使用?感谢您的阅读.

That's a lot of bananas. I've seen people use something like b as the new variable name (which could get hard-to-read in a larger block of code), but I'm wondering if there's a generally accepted standard for the style of variable name to use with optional binding? Thanks for reading.

推荐答案

只需使用相同的名称:

if let bananasInBarrel = bananasInBarrel {
  print("We have \(bananasInBarrel) bananas in the barrel.")
}

不要使用匈牙利符号-如果您使用的是未包装的可选内容，则编译器会抱怨.

Don't use hungarian notation - the compiler will complain if you are using an unwrapped optional.

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