how do u make unique set of elements?

ameylimaye · 09-28-2011, 05:06 AM

hello,
i have a list of around 500 names..
each name repeats for atleast 3 or four times...but i want it to appear only once...can anyone help me in this.!

thank you in advance..

arochester · 09-28-2011, 05:09 AM

Homework?

colucix · 09-28-2011, 05:16 AM

Take a look at the uniq command. If you have the names in a file, once per line you can simply try:

Code:

uniq <(sort filename)

The sorting is needed because uniq remove adjacent duplicates. If you don't want to sort the output, try awk as in:

Code:

awk '!_[$1]++' filename

snooly · 09-28-2011, 05:27 AM

sort filename.txt | uniq

ameylimaye · 09-28-2011, 05:56 AM

Thank you!