如何在向量的向量中打印元素 [英] How to print elements in a vector of vectors

问题描述

我有一个向量矢量，我想在每个向量中打印元素

I have a vector of vectors, and I want to print elements in each vector

我尝试了pprint但没有按要求工作

I tried the pprint but did not work as wanted

这是我要打印的向量的向量：

This is the vector of vectors I wish to print:

[["+" "+" "+" "#" "!" "-" "#" "#" "#" "-" "-" "-" "-"]
 ["!" "#" "+" "+" "+" "#" "+" "+" "+" "-" "#" "#" "-"]
 ["#" "#" "#" "#" "+" "#" "+" "#" "+" "#" "-" "#" "#"]
 ["+" "+" "+" "#" "+" "+" "+" "#" "+" "#" "-" "-" "-"]
 ["+" "#" "+" "#" "#" "#" "#" "+" "+" "-" "#" "#" "-"]
 ["+" "#" "+" "+" "+" "+" "+" "+" "#" "-" "-" "-" "-"]
 ["+" "#" "#" "#" "#" "#" "#" "#" "#" "#" "#" "#" "#"]
 ["+" "+" "+" "+" "+" "+" "+" "+" "+" "+" "+" "+" "@"]]

这是我想要的输出：

+++#--###--#-
!#+++#+++-##-
####+#+#+#!##
+++#+++#+#!!!
+#+####++!##!
+#++++++#!!!!
+############
++++++++++++@

推荐答案

您可以使用 cl格式使用控制字符串处理列表（在这种情况下为列表的列表）：

You can use cl-format to handle list (and list of list in this case) with a control string:

(def input
  [["+" "+" "+" "#" "!" "-" "#" "#" "#" "-" "-" "-" "-"]
   ["!" "#" "+" "+" "+" "#" "+" "+" "+" "-" "#" "#" "-"]
   ["#" "#" "#" "#" "+" "#" "+" "#" "+" "#" "-" "#" "#"]
   ["+" "+" "+" "#" "+" "+" "+" "#" "+" "#" "-" "-" "-"]
   ["+" "#" "+" "#" "#" "#" "#" "+" "+" "-" "#" "#" "-"]
   ["+" "#" "+" "+" "+" "+" "+" "+" "#" "-" "-" "-" "-"]
   ["+" "#" "#" "#" "#" "#" "#" "#" "#" "#" "#" "#" "#"]
   ["+" "+" "+" "+" "+" "+" "+" "+" "+" "+" "+" "+" "@"]])

(use 'clojure.pprint)

(cl-format *out* "~{~{~a~}~%~}" input)

输出：

+++#!-###----
!#+++#+++-##-
####+#+#+#-##
+++#+++#+#---
+#+####++-##-
+#++++++#----
+############
++++++++++++@

说明：
〜a 是任何类型的format参数。当包含在〜{和〜} 中时，format参数将在列表上迭代。因此，当用〜{和〜} 包围两次时，〜a 将应用于嵌套列表中的每个元素（字符）。最后一个〜} 之前的〜％是输出换行符。
这样，您可以轻松地使用控制字符串更改输出。例如：

Explanation: ~a is the format argument of any type. When enclosed in ~{ and ~}, the format argument will be iterated over a list. So when enclosed twice with ~{ and ~}, ~a will be applied over each element (character) in the nested list. The ~% before the last ~} is to output a newline. With this, you can easily change the output with control string. For example:

(cl-format *out* "~{~{(~a)~^ ~}~^~%~%~}" input)

(+) (+) (+) (#) (!) (-) (#) (#) (#) (-) (-) (-) (-)

(!) (#) (+) (+) (+) (#) (+) (+) (+) (-) (#) (#) (-)

(#) (#) (#) (#) (+) (#) (+) (#) (+) (#) (-) (#) (#)

(+) (+) (+) (#) (+) (+) (+) (#) (+) (#) (-) (-) (-)

(+) (#) (+) (#) (#) (#) (#) (+) (+) (-) (#) (#) (-)

(+) (#) (+) (+) (+) (+) (+) (+) (#) (-) (-) (-) (-)

(+) (#) (#) (#) (#) (#) (#) (#) (#) (#) (#) (#) (#)

(+) (+) (+) (+) (+) (+) (+) (+) (+) (+) (+) (+) (@)

请注意， 〜^ 是在运行列表时停止迭代的指令出来。因此， 〜^< space> 将取消每行最后一个元素之后的空格。 〜^〜％〜％将取消最后一行之后的双换行符。

Note that "~^" is the directive to stop iteration when a list is run out. So "~^<space>" will suppress the space after the last element in each line. And "~^~%~%" will suppress the double newline after the last line.

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