Solved

Simple Perl Script to get Unique values from file

Posted on 2011-03-21
2
482 Views
Last Modified: 2012-06-21
It has been a few years since I have used Perl.  I have a text file with about 400 entries.  There are duplicates in the file.  An example of the input file would be.

smith
jones
taylor
smith
bruce

I need a output file with only the unique values.  An example of the output file

smith
jones
taylor
bruce

order is not important - I just need the unique values

0
Comment
Question by:jkteater
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 84

Accepted Solution

by:
ozo earned 125 total points
ID: 35183290
see
perldoc -q duplicate

perl -lne 'print unless $seen{$_}++' <inputfile > outputfile
0
 

Author Closing Comment

by:jkteater
ID: 35183386
Thanks
0

Featured Post

Want Experts Exchange at your fingertips?

With Experts Exchange’s latest app release, you can now experience our most recent features, updates, and the same community interface while on-the-go. Download our latest app release at the Android or Apple stores today!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

On Microsoft Windows, if  when you click or type the name of a .pl file, you get an error "is not recognized as an internal or external command, operable program or batch file", then this means you do not have the .pl file extension associated with …
There are many situations when we need to display the data in sorted order. For example: Student details by name or by rank or by total marks etc. If you are working on data driven based projects then you will use sorting techniques very frequently.…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Six Sigma Control Plans

623 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question