Question

是否可以在scala中声明变量作为一系列指令的结果？我正在尝试做一些与以下F＃片段相同的东西

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Answer 1

当然，你可以在Scala中做这样的事情：

val (gSmall, gLarge, defaultOrder) = 
if (g1remainingNodesToMap.size <= g2remainingNodesToMap.size) { 
    (g1remainingNodesToMap, g2remainingNodesToMap, true)
} else {
    (g2remainingNodesToMap, g1remainingNodesToMap, false)
}

Answer 2

Scala中的等效内容如下：

val (gSmall, gLarge, defaultOrder) = 
  if (g1remainingNodesToMap.size <= g2remainingNodesToMap.size)
    (g1remainingNodesToMap, g2remainingNodesToMap, true)
  else (g2remainingNodesToMap, g1remainingNodesToMap, false)

现在，您可以引用gSmall，gLarge和defaultOrder。为了使这个具体：

scala> val g1remainingNodesToMap = Map("one" -> 1, "two" -> 2)
g1remainingNodesToMap: scala.collection.immutable.Map[String,Int] = Map(one -> 1, two -> 2)

scala> val g2remainingNodesToMap = Map("three" -> 3, "four" -> 4, "five" -> 5)
g2remainingNodesToMap: scala.collection.immutable.Map[String,Int] = Map(three -> 3, four -> 4, five -> 5)

scala> :paste
// Entering paste mode (ctrl-D to finish)

val (gSmall, gLarge, defaultOrder) = 
  if (g1remainingNodesToMap.size <= g2remainingNodesToMap.size)
    (g1remainingNodesToMap, g2remainingNodesToMap, true)
  else (g2remainingNodesToMap, g1remainingNodesToMap, false)

// Exiting paste mode, now interpreting.

gSmall: scala.collection.immutable.Map[String,Int] = Map(one -> 1, two -> 2)
gLarge: scala.collection.immutable.Map[String,Int] = Map(three -> 3, four -> 4, five -> 5)
defaultOrder: Boolean = true

scala> gSmall
res0: scala.collection.immutable.Map[String,Int] = Map(one -> 1, two -> 2)

scala> gLarge
res1: scala.collection.immutable.Map[String,Int] = Map(three -> 3, four -> 4, five -> 5)

scala> defaultOrder
res2: Boolean = true

声明变量scala作为指令集

2 个答案: