Shell Programming and Scripting

File_A contains Strings:
a
b
c
d

File_B contains Strings:
a
c
z



Need to have script written in either sh or ksh. Derive resultant files (File_New_A and File_New_B) from lists File_A and File_B where string elements in File_New_A and File_New_B are listed below.

Resultant files:
File_New_A contains String:
a
c


File_New_B contains String:
z


Thank you in advance for your help.
mlv_99

Thanks for the reply danmero. I made a mistake in the description. Let me re-phrase the question again.


File_A contains Strings and content's elements are NOT IN ANY ORDER OR PATTERN AND file varies in size from one run to the next run:
a <- in both File_A and File_B
b <- unique to File_A
c <- in both File_A and File_B
d <- unique to File_A

File_B contains Strings and content's elements are NOT IN ANY ORDER OR PATTERN AND file varies in size from one run to the next run:
a <- in both File_A and File_B
c <- in both File_A and File_B
z <- unique to File_B



Need to have script written in either sh or ksh. Resultant files (File_New_A and File_New_B) is derived from comparing contents of files File_A and File_B where resultant string elements in File_New_A and File_New_B are listed below. Resultant File_New_A will contain only unique elements found only in File_A when compared with File_B. File_New_B will contain only unique elements found in only File_B when compared with File_A.


Resultant files:
File_New_A contains String:
b <- unique to File_A
d <- unique to File_A


File_New_B contains String:
z <- unique to File_B


++++++++++++++++++++++++++++++++++++++

The next run could have

File_A contains Strings and content's elements are NOT IN ANY ORDER OR PATTERN AND file varies in size from one run to the next run:
m <- only in File_A
n <- only in File_A
o <- only in File_A
p <- only in File_A
q <- in both File_A and File_B
r <- in both File_A and File_B

File_B contains Strings and content's elements are NOT IN ANY ORDER OR PATTERN AND file varies in size from one run to the next run:
q <- in both File_A and File_B
r <- in both File_A and File_B

Resultant files after comparing File_A and File_B:

Resultant files:
File_New_A contains String:
m <- unique to File_A
n <- unique to File_A
o <- unique to File_A
p <- unique to File_A

File_New_B contains String:

No elements in File_New_B since File_B have no unique elements to File_B, all files in File_B are also in File_A; therefore File_New_B is empty.

I hope this is more clearer.

Thank you.

Matt

Code:

awk 'NR==FNR{arr[$0];next}$0 in arr{next}1' File_A File_B

You can change the input file order to get the opposite.

You guys are awesome! Masters of the one-liners! Works perfectly! Thanks so much for your help.
Matt

Now is clear

Code:

grep -vf File_B File_A > File_New_A

Code:

grep -vf File_A File_B > File_New_B

Thanks Danmero! Exactly what I was looking for!
-Matt

Hi,

I have a question. My post was not published, I have no idea why. But, it is a good.
The command "comm" is not suitable for this? If not, why?

Greeting