emacs中的矩形函数 [英] Rectangle functions in emacs

问题描述

我在几个地方读过矩形在emacs中的功能非常有用。我已经读了一些关于他们，我不太明白为什么。我的意思是，当你想杀死一个段落，你标记第一行/列，然后是最后一个，这实际上是一个矩形，对吗？但是你仍然可以使用正常的kill ...

I've read in several places that the rectangle functions in emacs are very useful. I've read a bit about them, and I can't quite figure why. I mean, when you want to kill a paragraph, you mark the first row/column and then the last one, and that's actually a rectangle, right? But you can still use the normal kill...

那么你可以用什么样的转换？

So what kind of transformations would you do with them?

推荐答案

如果您在具有 Mx delete-rectangle 或的文本文件列中的数据，矩形可以删除单列数据。类似地， Mx yank-rectangle 将粘贴在文本列中。

If you have data in columns in a text file with M-x delete-rectangle or M-x kill-rectangle you can delete a single column of data. Similarly, M-x yank-rectangle will paste in a column of text.

例如，请输入以下文本：

For example, take the following text:

1. alligator    alphorn
2. baboon       bugle
3. crocodile    cornet
4. dog          didgeridoo
5. elephant     euphonium 
6. fish         flugelhorn   
7. gopher       guitar

从鳄鱼吉他中选择吉他。选择的开始和结束标记出矩形的两个相对的角。输入 M-x杀死矩形，你马上有：

Select from the a of alligator to the g of guitar. The beginning and end of the selection mark out two opposite corners of the rectangle. Enter M-x kill-rectangle and you immediately have:

1. alphorn
2. bugle
3. cornet
4. didgeridoo
5. euphonium 
6. flugelhorn
7. guitar

下一步将标记放在顶行末尾，如果需要，添加几个空格，然后输入 Mx yank - rectangle 和ta-da！您已重新排序列：

Next put the mark at the end of the top line, add a few spaces if required and enter M-x yank-rectangle and ta-da! You have re-ordered the columns:

1. alphorn      alligator    
2. bugle        baboon       
3. cornet       crocodile    
4. didgeridoo   dog          
5. euphonium    elephant     
6. flugelhorn   fish         
7. guitar       gopher       

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