* nix中：执行列表的并集/交集/差 [英] *nix: perform set union/intersection/difference of lists

问题描述

我有时需要比较两个文本文件。显然，差异显示的差异，它也隐藏的相似性，这是一种点的。

假设我想对这些文件的其他比较：并集，交集和减法，把每行作为集的元素

是否有同样简单的常用工具或单行能做到这一点？

---

例如：

A.TXT

 约翰
玛丽
 

b.txt

  ADAM
约翰
 

---

  $＆GT; set_union A.TXT b.txt
约翰
玛丽
亚当
 

---

  $＆GT; set_intersection A.TXT b.txt
约翰
 

---

  $＆GT; set_difference A.TXT b.txt
玛丽
 

解决方案

联盟：排序-u 的文件... 的

交叉路口：排序的文件... 的 | uniq的-d

区别：排序的文件... 的 | uniq的-u

I sometimes need to compare two text files. Obviously, diff shows the differences, it also hides the similarities, which is kind of the point.

Suppose I want to do other comparisons on these files: set union, intersection, and subtraction, treating each line as an element in the set.

Are there similarly simple common utilities or one-liners which can do this?

---

Examples:

a.txt

john
mary

b.txt

adam
john

---

$> set_union a.txt b.txt
john
mary
adam

---

$> set_intersection a.txt b.txt
john

---

$> set_difference a.txt b.txt
mary

解决方案

Union: sort -u files...

Intersection: sort files... | uniq -d

Difference: sort files... | uniq -u

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