002.Scala中 :: 和 ::: 冒号的使用情况

最新推荐文章于 2025-06-04 13:30:09 发布

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最新推荐文章于 2025-06-04 13:30:09 发布

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原文链接：https://my.oschina.net/repine/blog/663977

本文深入探讨了编程领域中，为何大部分程序员难以晋升为架构师的原因，从技术能力、思维模式、沟通协作等多个维度解析这一现象。

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def ::(x: B): List[B]

[use case] Adds an element at the beginning of this list.
Example:
1 :: List(2, 3) = List(2, 3).::(1) = List(1, 2, 3)
x
the element to prepend.
returns
a list which contains x as first element and which continues with this list.

def :::(prefix: List[B]): List[B]

[use case] Adds the elements of a given list in front of this list.
Example:
List(1, 2) ::: List(3, 4) = List(3, 4).:::(List(1, 2)) = List(1, 2, 3, 4)
prefix
The list elements to prepend.
returns
a list resulting from the concatenation of the given list prefix and this list.

转载于:https://my.oschina.net/repine/blog/663977