sorta need help on sorting with awk 1

[dirons]

First of all I do not have access to the unix sort -u command. I have this file which I need to get all of the
unique lines out of. Please help.

Here's an example of the file:

A!CLASS!SUBCLASS!
J!D:\Allegro_extractions\new_nt_extractions\cdsfab\pcb.brd!Thu Feb 07 16:36:19 2002!-7155.974!-3086.000!35770.000!26914.000!0.001!mils!!72.0874 mil!8!UP TO DATE!
S!ETCH!BOT!
S!ETCH!LY2!
S!ETCH!LY3!
S!ETCH!LY4!
S!ETCH!LY4!
S!ETCH!LY4!
S!ETCH!LY4!
S!ETCH!LY4!
S!ETCH!LY5!
S!ETCH!LY5!
S!ETCH!LY5!
S!ETCH!LY5!
S!ETCH!LY5!
S!ETCH!LY5!

 

[CaKiwi]

I assume the file is sorted. If so, this awk program will remove duplicate lines.

{
  if (a != $0) {
    print
    a = $0
  }
}

Hope this helps.

CaKiwi

 

[Krunek]

This awk command prints only unique lines even input data isn't sorted, but output is unsorted:

awk '{ a[$0] = $0 }  END { for (i in a) print i }' inputfile

I use array (awk's arrays are associative); this is a powerful awk-tool.

Bye!

KP.