下面是option的一个小练习,直接上代码:
import scala.collection.mutable.ArrayBuffer
object OptionTest {
def main(args: Array[String]) {
val tmp1 = Option(Array(1,2))
val tmp2 = Option(None)
case class Info(name:String,age:Long)
val tmp3 = ArrayBuffer[Option[Info]]()
tmp3 += None
tmp3 += Some(Info("abc",18))
tmp3 += None
tmp3 += Some(Info("efg",60))
tmp3.toArray.foreach(item=>println(item.isDefined,if(item.isDefined) "name=%s:age=%s".format(item.get.name,item.get.age) else "本对象为None"))
}
}
运行结果为: