有人知道如何在Haskell中生成一个网格吗？ [英] Does anybody know how to generate a grid in Haskell?

问题描述

而不是像以下2D列表：

[[1,2]，[3,4]]



我想知道是否有任何方法可以使用：



  [1，2] 
 [3,4]  

或者类似的方式在行之间有一个硬入口，我可以引用列表中的元素作为索引i和j？

解决方案

很多方法可以做到这一点，但如果你现在正在做的话

$ p code print grid


尝试将其替换为

  mapM_ print grid 
  

分别打印每一行。

Instead of having a 2D list like:

[[1,2],[3,4]]

I was wondering if there is any way that you can have:

[1, 2]
[3, 4] 

Or something in the similar manner where there is a hard enter between rows and I can refer to an element in the list as index i and j?

解决方案

There are many ways to do this, but if you're currently doing

print grid

try replacing it with

mapM_ print grid

to print each row separately.

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