27 lines
1.3 KiB
ReStructuredText
27 lines
1.3 KiB
ReStructuredText
|
Inverse of `sort`
|
|||
|
|
#################
|
|||
|
|
|
|||
|
|
:date: 2011-09-18T14:57:31Z
|
|||
|
|
:category: blog
|
|||
|
|
:tags: linux,command-line
|
|||
|
|
:url: blog/2011/9/18/inverse-of-sort.html
|
|||
|
|
:save_as: blog/2011/9/18/inverse-of-sort.html
|
|||
|
|
:status: published
|
|||
|
|
:author: Gergely Polonkai
|
|||
|
|
|
|||
|
|
I’m using \*NIX systems for about 14 years now, but it can still show me new things. Today I had
|
|||
|
|
to generate a bunch of random names. I’ve create a small perl script which generates permutations
|
|||
|
|
of some usual Hungarian first and last names, occasionally prefixing it with a ‘Dr.’ title or
|
|||
|
|
using double first names. For some reasons I forgot to include uniqueness check in the script.
|
|||
|
|
When I ran it in the command line, I realized the mistake, so I appended ``| sort | uniq`` to the
|
|||
|
|
command line. So I had around 200 unique names, but in alphabetical order, which was awful for my
|
|||
|
|
final goal. Thus, I tried shell commands like ``rand`` to create a random order, and when many of
|
|||
|
|
my tries failed, the idea popped in my mind (not being a native English speaker): “I don’t have to
|
|||
|
|
create »random order«, but »shuffle the list«. So I started typing ``shu``, pressed Tab in the
|
|||
|
|
Bash shell, and voilà! ``shuf`` is the winner, it does just exactly what I need:
|
|||
|
|
|
|||
|
|
**NAME**
|
|||
|
|
shuf - generate random permutations
|
|||
|
|
|
|||
|
|
Thank you, Linux Core Utils! :)
|