我可以在Scala中将一个元素生成或映射到多个元素中吗？

发布时间：2020-12-16 08:52:03 所属栏目：安全来源：网络整理

导读：val inArray = Array("a","b","c","d")// ...val outArray = Array("a1","a2","a3","b1","b2","b3","c1","c2","c3","d1","d2","d3") 如何将inArray映射到outArray？我们的想法是迭代inArray,从它的每个元素中产生3个元素(通过连接这个例子中的索引). 解决方

val inArray = Array("a","b","c","d")
// ...
val outArray = Array("a1","a2","a3","b1","b2","b3","c1","c2","c3","d1","d2","d3")

如何将inArray映射到outArray？

我们的想法是迭代inArray,从它的每个元素中产生3个元素(通过连接这个例子中的索引).

解决方法

你可以用flatMap做到这一点.

inArray.flatMap(c => (1 to 3).map(c+))

（编辑：李大同）

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