在Scala中简化Option [Boolean]表达式 [英] Simplifying Option[Boolean] expression in Scala

问题描述

我有这样的代码:

optionBoolean.getOrElse(false) && otherOptionBoolean.getOrElse(false)

Scalastyle告诉我可以简化它.怎么样?

And Scalastyle tells me that it can be simplified. How?

推荐答案

您可以尝试以下操作:

Seq(optionBoolean, otherOptionBoolean).forall(_.contains(true))

在Scala 2.13中(与先前版本非常相似)， forall 方法位于

In Scala 2.13 (it is very similar in prior versions) the forall method is located at IterableOnce, and its implementation is:

def forall(p: A => Boolean): Boolean = {
  var res = true
  val it = iterator
  while (res && it.hasNext) res = p(it.next())
  res
}

因此，一旦有一个不满足条件的值，循环就会中断，其余的将不会被测试.

Therefore once there is a value that doesn't satisfy the condition, the loop will break, and the rest will not be tested.

代码在 Scastie .

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