用于分析数据的树输出的库 [英] Library for tree output of data for analysis

问题描述

为便于分析数据，我想使用一个库来获得以下代码：

  data SomeType = A [String] Int | B | C Int推导（Eq，Ord，Show）
 
 main = do 
让theData = A [a，b，c] 9：C 3：B：[ ] 
 putStr $ treeString theData  - `treeString`是隐含的库函数
  

会产生类似于以下的输出：

   -  A：
 | -   -  a 
 | | -  b 
 | | -  c 
 | -  9 
  -  C：
 | -  3 
  -  B 
  

是否有这样一个库？或者，也许更好的方法来解决这个问题？ Data.Tree 有 drawTree 和 drawForest 函数具有相似的格式，因此您可以编写一个函数将您的数据结构转换为 Tree String 然后使用 drawTree 。

  import Data.Tree 
 
 data SomeType = A [String] Int | B | C Int派生（Eq，Ord，Show）
 
 toTree :: SomeType  - >树字符串
 toTree（A xs n）=节点A[节点*（地图（翻转节点[]）xs），节点（节点n）[]] 
 toTree B =节点 B[] 
 toTree（C n）=节点C[Node（show n）[]] 
 
 main = do 
 let theData = A [a ，b，c] 9：C 3：B：[] 
 putStr $ drawTree（Node*（map toTree theData））
  

输出：
$ b

  * 
 | 
 +  -  A 
 | | 
 | +  -  * 
 | | | 
 | | +  -  a 
 | | | 
 | | +  -  b 
 | | | 
 | | ` -  c 
 | | 
 | ` -  9 
 | 
 +  -  C 
 | | 
 | ` -  3 
 | 
` -  B 
  

For convenient analysis of data I'd like to use a library which for the following code:

data SomeType = A [String] Int | B | C Int deriving (Eq, Ord, Show)

main = do 
  let theData = A ["a", "b", "c"] 9 : C 3 : B : []
  putStr $ treeString theData -- `treeString` is the implied library function

would produce an output similar to the following:

- A:
| - - a
| | - b
| | - c
| - 9
- C:
| - 3
- B

Is there such a library? Or maybe a better approach to such a problem?

解决方案

Data.Tree has drawTree and drawForest functions with similar formatting, so you can write a function to convert your data structure to a Tree String and then use drawTree.

import Data.Tree

data SomeType = A [String] Int | B | C Int deriving (Eq, Ord, Show)

toTree :: SomeType -> Tree String
toTree (A xs n) = Node "A" [Node "*" (map (flip Node []) xs), Node (show n) []]
toTree B        = Node "B" []
toTree (C n)    = Node "C" [Node (show n) []]

main = do 
  let theData = A ["a", "b", "c"] 9 : C 3 : B : []
  putStr $ drawTree (Node "*" (map toTree theData))

Output:

*
|
+- A
|  |
|  +- *
|  |  |
|  |  +- a
|  |  |
|  |  +- b
|  |  |
|  |  `- c
|  |
|  `- 9
|
+- C
|  |
|  `- 3
|
`- B

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