：和++的区别

Question

对于scala列表，它们之间有什么区别

:::

和

++

来自doc

:::  Adds an element at the beginning of this list.
++  Returns a new list containing the elements from the left hand operand followed by the elements from the right hand operand.

Answer 1

:::连接两个列表，例如。list1 ::: list2

++连接任意两个集合，例如。list1 ++ list2。备注仅在scala 2.8中可用。