我如何在 Scala 中进行转换？
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时间：2020-10-22 03:12:59 来源:igfitidea点击:
How do I do casting in Scala?
提问by deltanovember
For example suppose I have
例如假设我有
val myDouble = 25.7
val myInt = 5
How would I do something like
我该怎么做
val divide = (Int) (myDouble / myInt)
回答by Moe Matar
You can do (myDouble/myInt).toInt. You can also do toDouble, toLong, and toFloat.
你可以做到(myDouble/myInt).toInt。你也可以做toDouble，toLong和toFloat。
回答by paradigmatic
My prefered way is to add a rounding method, to reduce any potential suprise in the conversion behavior:
我更喜欢的方法是添加一个舍入方法，以减少转换行为中的任何潜在意外：
val divide = (myDouble/myInt).ceil.toInt
or
或者
val divide = (myDouble/myInt).floor.toInt
回答by Daniel Hinojosa
or you could do...
或者你可以做...
scala> val myDouble = 25.7
myDouble: Double = 25.7
scala> val myInt = 5
myInt: Int = 5
scala> val divide = (myDouble / myInt).asInstanceOf[Int]
divide: Int = 5
