Scala:布尔到选项 [英] Scala: Boolean to Option

问题描述

我有一个布尔值并且想避免这种模式:

I have a Boolean and would like to avoid this pattern:

if (myBool) 
  Option(someResult) 
else 
  None

我想做的是

myBool.toOption(someResult)

对代码示例的任何建议将不胜感激.

Any suggestions with a code example would be much appreciated.

推荐答案

从 Scala 2.13 开始，Option 有一个 when 用于此确切目的的构建器:

Starting Scala 2.13, Option has a when builder for this exact purpose:

Option.when(condition)(result)

例如:

Option.when(true)(3)
// Option[Int] = Some(3)
Option.when(false)(3)
// Option[Int] = None

另请注意 Option.unless 促进相反的条件.

Also note Option.unless which promotes the opposite condition.

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