n 海螺
Begin by creating a recursive concat function.
首先创建递归的concat函数。
Concat itself is a an extension method implemented as such.
代码中的Concat是一个扩展方法(extension method),其实现如下。
We add additional implementations for: concat and: compare-criteria.
我们添加了额外的:concat和:compare - criteria实现。
Note that the eval-concat in Listing 7 only partially solves our problem.
请注意,清单7中的eval - concat仅仅是解决了我们的部分问题。
Concat joins two or more arrays. The method does not change the existing arrays.
联接两个或多个数组,该方法不改变现有的数组。