本文介绍了如何在Scala中使用map并接收索引?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 $ p $ / h2_lin>解决方案我相信你正在寻找zipWithIndex? scala> val ls = List(Mary,had,a,little,lamb) scala> ls.zipWithIndex.foreach {case(e,i)=> println(i ++ e)} 0 Mary 1有 2 a 3 little 4 lamb 来自: http://www.artima.com/forums/flat.jsp?forum=283&thread=243570 您还有((e,i) ,little,lamb)。zipWithIndex)println(i ++ e) : 列表(Mary,had,a,little,lamb)zipWithIndex。 foreach((t)=> println(t._2 ++ t._1)) Is there any List/Sequence built-in that behaves like map and provides the element's index as well? 解决方案 I believe you're looking for zipWithIndex?scala> val ls = List("Mary", "had", "a", "little", "lamb")scala> ls.zipWithIndex.foreach{ case (e, i) => println(i+" "+e) }0 Mary1 had2 a3 little4 lambFrom: http://www.artima.com/forums/flat.jsp?forum=283&thread=243570You also have variations like: for((e,i) <- List("Mary", "had", "a", "little", "lamb").zipWithIndex) println(i+" "+e)or:List("Mary", "had", "a", "little", "lamb").zipWithIndex.foreach( (t) => println(t._2+" "+t._1) ) 这篇关于如何在Scala中使用map并接收索引?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 10-14 07:37