Print the lines that are in any of the inputs.
Syntax:
extra <input> ...
Example:
$ extra 1.txt 2.txt
=> lines that are not in 1.txt, but are in 2.txt.
The order doesn't matter.
In set theory, this command is (A extra B) a.k.a. (B - A).
This command is currently implemented using awk and POSIX.
Related commands for Unix text processing sets:
union: print lines in (A union B)intersect: print lines in (A intersect B)except: print lines in (A except B) a.k.a. (A - B)extra: print lines in (A extra B) a.k.a. (B - A)
Examples:
$ cat 1.txt
alpha
bravo
$ cat 2.txt
alpha
charlie
$ union 1.txt 2.txt
alpha
bravo
charlie
$ intersect 1.txt 2.txt
alpha
$ except 1.txt 2.txt
bravo
$ extra 1.txt 2.txt
charlie
- Program: extra
- Version: 2.0.2
- Created: 2017-01-30
- Updated: 2017-01-30
- License: GPL
- Contact: Joel Parker Henderson (joel@joelparkerhenderson.com)