相當於JavaScript數組傳播的斯卡拉

Question

在JavaScript中有不錯的spread operator。從MDN

實施例：

var parts = ['shoulders', 'knees']; 
var lyrics = ['head', ...parts, 'and', 'toes']; 
// ["head", "shoulders", "knees", "and", "toes"] 

是否有在Scala中的等效？

Answer 1

如何

val lyrics = Seq("head") ++ parts ++ Seq("and", "toes") 

Answer 2

總是有patch()。它的論點有點神祕，因爲它具有更廣泛，更普遍的應用領域。

val parts = List("shoulders", "knees") 
val lyrics = List("head", "and", "toes") 

lyrics.patch(1, parts, 0) // res0: List(head, shoulders, knees, and, toes) 

Answer 3

這可能會實現：

val parts = List("shoulders", "knees") 
val lyrics = "head" :: parts.::("and").::("knees") 

然而，這僅適用於List型