Remove duplicate chars and sort string [SED]


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Remove duplicate chars and sort string [SED]
# 1  
Old 06-21-2012
Remove duplicate chars and sort string [SED]

Hi,

INPUT:
DCBADD

OUTPUT:
ABCD

The SED script should alphabetically sort the chars in the string and remove the duplicate chars.
# 2  
Old 06-21-2012
Does it have to be sed?
# 3  
Old 06-21-2012
Yes. No 'uniq' or 'sort' this time Smilie
# 4  
Old 06-21-2012
And why no "uniq" or "sort"? Is it some homework?
# 5  
Old 06-21-2012
No. It is a question asked on previous exams and
I was wondering how to answer it.
# 6  
Old 06-21-2012
Do not post classroom or homework problems in the main forums. Homework and coursework questions can only be posted in this forum under special homework rules.

Please review the rules, which you agreed to when you registered, if you have not already done so.

More-than-likely, posting homework in the main forums has resulting in a forum infraction. If you did not post homework, please explain the company you work for and the nature of the problem you are working on.

If you did post homework in the main forums, please review the guidelines for posting homework and repost.

Thank You.

The UNIX and Linux Forums.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

sed - print only the chars that match a given set in a string

For a given string that may contain any ASCII chars, i.e. that matches .*, find and print only the chars that are in a given subset. The string could also have numbers, uppercase, special chars such as ~!@#$%^&*(){}\", whatever a user could type in without going esoteric For simplicity take... (1 Reply)
Discussion started by: naderra
1 Replies

2. Shell Programming and Scripting

sed to remove newline chars based on pattern mis-match

Greetings Experts, I am in AIX; I have a file generated through awk after processing the input files. Now I need to replace or remove the new-line characters on all lines that doesn't have a ; which is the last character on the line. I tried to use sed 's/\n/ /g' After checking through the... (6 Replies)
Discussion started by: chill3chee
6 Replies

3. Shell Programming and Scripting

Remove duplicate lines, sort it and save it as file itself

Hi, all I have a csv file that I would like to remove duplicate lines based on 1st field and sort them by the 1st field. If there are more than 1 line which is same on the 1st field, I want to keep the first line of them and remove the rest. I think I have to use uniq or something, but I still... (8 Replies)
Discussion started by: refrain
8 Replies

4. Shell Programming and Scripting

Remove not only the duplicate string but also the keyword of the string in Perl

Hi Perl users, I have another problem with text processing in Perl. I have a file below: Linux Unix Linux Windows SUN MACOS SUN SUN HP-AUX I want the result below: Unix Windows SUN MACOS HP-AUX so the duplicate string will be removed and also the keyword of the string on... (2 Replies)
Discussion started by: askari
2 Replies

5. Shell Programming and Scripting

Remove duplicate lines based on field and sort

I have a csv file that I would like to remove duplicate lines based on field 1 and sort. I don't care about any of the other fields but I still wanna keep there data intact. I was thinking I could do something like this but I have no idea how to print the full line with this. Please show any method... (8 Replies)
Discussion started by: cokedude
8 Replies

6. Shell Programming and Scripting

Sort and Remove Duplicate on file

How do we sort and remove duplicate on column 1,2 retaining the record with maximum date (in feild 3) for the file with following format. aaa|1234|2010-12-31 aaa|1234|2010-11-10 bbb|345|2011-01-01 ccc|346|2011-02-01 bbb|345|2011-03-10 aaa|1234|2010-01-01 Required Output ... (5 Replies)
Discussion started by: mabarif16
5 Replies

7. Shell Programming and Scripting

How to remove duplicate sentence/string in perl?

Hi, I have two strings like this in an array: For example: @a=("Brain aging is associated with a progressive imbalance between intracellular concentration of Reactive Oxygen Species","Brain aging is associated with a progressive imbalance between intracellular concentration of Reactive... (9 Replies)
Discussion started by: vanitham
9 Replies

8. Shell Programming and Scripting

How to remove duplicate records with out sort

Can any one give me command How to delete duplicate records with out sort. Suppose if the records like below: 345,bcd,789 123,abc,456 234,abc,456 712,bcd,789 out tput should be 345,bcd,789 123,abc,456 Key for the records is 2nd and 3rd fields.fields are seperated by colon(,). (19 Replies)
Discussion started by: svenkatareddy
19 Replies

9. Solaris

How to remove duplicate records with out sort

Can any one give me command How to delete duplicate records with out sort. Suppose if the records like below: 345,bcd,789 123,abc,456 234,abc,456 712,bcd,789 out tput should be 345,bcd,789 123,abc,456 Key for the records is 2nd and 3rd fields.fields are seperated by colon(,). (2 Replies)
Discussion started by: svenkatareddy
2 Replies

10. UNIX for Dummies Questions & Answers

Extracting the last 3 chars from a string using sed

Hi. Can I extract the last 3 characters from a given string using sed ? Why the following doesn't work (it prints the full string) : echo "abcd" | sed '/\.\.\.$/p' doesn't work ? output: abcd Thanks in advance, 435 Gavea. (7 Replies)
Discussion started by: 435 Gavea
7 Replies
Login or Register to Ask a Question