Compare two variables and print the difference


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Compare two variables and print the difference
# 8  
Old 08-06-2019
Please become accustomed and tightly adhere to telling people in here your OS and shell versions with every new thread! Solutions given above rely on being run with a recent bourne shell, like bash or ksh.
Using shell arrays is an apt approach for tasks like given, eliminating "horizontal" and "vertical" problems. Both rdrtx1 and Chubler_XL use it, (set -A being ksh- specific). Make sure your shell provides arrays. If you run your scripts in e.g. sh, none of the proposals will work.

Try (recent bash required)


Code:
PRIM_SEQ=($(some sql code))
STDBY_SEQ=($(some sql code))
for i in ${!PRIM_SEQ[*]}; do echo $(( PRIM_SEQ[i] - STDBY_SEQ[i] )); done
150
80


Last edited by RudiC; 08-06-2019 at 10:17 AM.. Reason: correction of typo (STB <-> STDBY), thanks to wisecracker!
This User Gave Thanks to RudiC For This Post:
# 9  
Old 08-06-2019
Hi amar1208...

Just a note reference rdrtx1's post #2:
The first line should read something like #!/bin/bash as 'sh' assumes POSIX compatibility so ARRAYS are technically not possible.
Make sure you are using bash, ksh or another advanced shell to get that facility.

--- Post updated at 02:26 PM ---

I hope this does not attach itself to my previous:
RudiC's code works absolutely fine on bash version:
Code:
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin18)
Copyright (C) 2007 Free Software Foundation, Inc.

Modified with real commands and fixed values:
Code:
#!/bin/bash
PRIM_SEQ=($( python -c "print('200 100')" ))
STDBY_SEQ=($( echo "50 20" ))
for i in ${!PRIM_SEQ[*]}; do echo $(( PRIM_SEQ[i] - STDBY_SEQ[i] )); done

Note to RudiC:
'STB_SEQ' should read 'STDBY_SEQ'...

Last edited by wisecracker; 08-06-2019 at 09:42 AM.. Reason: Sigh, second upload attached to my previous!
This User Gave Thanks to wisecracker For This Post:
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Compare two variables and print the difference

compare two variables and print the difference i have two variables X1=rac1,rac2 Y1=rac2,rac3 output=rac1,rac3 Use code tags to wrap code fragments or data samples. (1 Reply)
Discussion started by: jhonnyrip
1 Replies

2. Shell Programming and Scripting

Simple awk command to compare two files and print first difference

Hello, I have two text files, each with a single column, file 1: 124152970 123899868 123476854 54258288 123117283 file 2: 124152970 123899868 54258288 123117283 122108330 (5 Replies)
Discussion started by: LMHmedchem
5 Replies

3. Shell Programming and Scripting

Compare file1 for matching line in file2 and print the difference in matching lines

Hello, I have two files file 1 and file 2 each having result of a query on certain database tables and need to compare for Col1 in file1 with Col3 in file2, compare Col2 with Col4 and output the value of Col1 from File1 which is a) not present in Col3 of File2 b) value of Col2 is different from... (2 Replies)
Discussion started by: RasB15
2 Replies

4. UNIX for Dummies Questions & Answers

compare / difference between sub-sections of files

Hi there, I'm sure this question has been asked many times but I can't find any posts with information. How can I check the differences between say lines 20 - 200 in file1 and lines 420 - 600 in file2? Thanks in advance for any help! js (2 Replies)
Discussion started by: js8765
2 Replies

5. Shell Programming and Scripting

Compare two columns in two files and print the difference

one file . . importing table employee 119 . . importing table jobs 1 2nd file . . importing table employee 120 . . importing table jobs 1 and would like... (2 Replies)
Discussion started by: jhonnyrip
2 Replies

6. Shell Programming and Scripting

Compare selected columns from a file and print difference

I have learned file comparison from my previous post here. Then, it is comparing the whole line. Now, i have a new problem. I have two files with 3 columns separated with a "|". What i want to do is to compare the second and third column of file 1, and the second and third column of file 2. And... (4 Replies)
Discussion started by: kingpeejay
4 Replies

7. Shell Programming and Scripting

Compare two files and print the two lines with difference

I have two files like this: #FILE 1 ABCD 4322 26485 JMTJ 5311 97248 XMPJ 4321 58978 #FILE 2 ABCD 4321 26485 JMTJ 5311 97248 XMPJ 4321 68978 What to do: Compare the two files and find those lines that doesn't match. And have a new file like this: #FILE 3 "from file 1" ABCD 4322 26485... (11 Replies)
Discussion started by: kingpeejay
11 Replies

8. Shell Programming and Scripting

Compare difference

Hi every body Help required file 1 aaaaa bbbb cccccc dddd ffff File 2 aaaaa,1,ee,44,5t,6y, cccccc, ..... dddd, ..... eeeeee, ..... ffff, ...... ggg, ....... (7 Replies)
Discussion started by: The_Archer
7 Replies

9. Shell Programming and Scripting

to compare two files and to print the difference

suppose one file P1168S P2150L P85L Q597R R1097C Another file P2150L P85L Q597R R1097C R1379C R1587K Then output shud be R1379C R1587K thanks (5 Replies)
Discussion started by: cdfd123
5 Replies

10. Shell Programming and Scripting

compare 2 file and print difference in the third file URG PLS

Hi I have two files in unix. I need to compare two files and print the differed lines in other file Eg file1 1111 2222 3333 file2 1111 2222 3333 4444 5555 newfile 4444 5555 Thanks In advance (3 Replies)
Discussion started by: evvander
3 Replies
Login or Register to Ask a Question