compare/match arrays

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting compare/match arrays
# 1  
Old 11-06-2008
compare/match arrays

Hi there all,

I am having a question.
Is it posible to compare elements of 2 different arrays?

For example I got
Array 1 | Array 2
123_abc | 123_bcd
123_bcd | 234_bcd
234_abc | 567_abc
234_bcd | 123_abc

than the match is
123_abc & 234_bcd and non of the others.
So how can I get this done?
to compare it?
yea with if statement but dont know how to get the compare on a whole aray.
I get if [ ${array1[0]} = ${array2[0]} ]
But that isnt what I need.
more like wild card all of array 2 to see if the words are a match.

Sorry I always sound so chaotic but I hope you people understand.
Thanx in advance!!!

Last edited by draco; 11-06-2008 at 10:07 AM..
# 2  
Old 11-09-2008
You didn't say what shell you were using so I'll presume ksh.

You can compare the entire arrays using if [[ "${array1[@]}" = "${array2[@]}" ]] because ${array[@]} expands to the entire contents of an array.

Obviously if you wanted to know which element differed you would need to go through it one-by-one.
# 3  
Old 11-10-2008

below perl script may help you, but if the arrays are too big, i do not think it is a good way to sort. May need more consideration on compare logic.

print "Match: $_" foreach(grep {mat($_);} @arr);
sub mat{
		return $_ if ($_ eq $t);


# 4  
Old 11-10-2008
You say you want to compare arrays but we need an idea on what you want to compare. Usually when comparing you're comparing with a pattern. i.e. does pattern 1 match pattern 2. Maybe you're wanting to combine the array elements after matching them with a pattern, and if so, what would be the pattern or rule you would use to compare the elements? After we know that then we can construct a routine that can combine them together.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Compare data - Match first column and compare second

Hi guys, looking for some help with a way to compare data in two files but with some conditions. example, File 1 consists of site1, site2, site3, File 2 contains site1,l0.1.1.1 site2, site3, site4, I want to be able to match the... (1 Reply)
Discussion started by: mutley2202
1 Replies

2. Shell Programming and Scripting

Using Diff to compare 2 arrays

I have two arrays and they look like this: array=(`cat /local/mnt/*sys/*includes|grep -v NEW`) array2=(`cat /tmp/*sys.z |grep -v NEW`) I am trying to compare them but I need to use the diff -u command. I am not sure how to do this. I cannot just do diff -u ${array} ${array2} I cannot... (4 Replies)
Discussion started by: newbie2010
4 Replies

3. Shell Programming and Scripting

Compare two arrays

Hi, I am trying to compare two lists that are held in two variables so I believe I need to access the array elements to compare these. I am using ksh 88 and the code I have tried is below: for file in ${origfilelist} do if ]] then print -- "File ${file}... (3 Replies)
Discussion started by: frodo61
3 Replies

4. Shell Programming and Scripting

perl: compare two arrays

Hi friends, I want to compare two arrays and find matched one using perl? Also, I want to delete unmatched one. Plz suggest me solution (1 Reply)
Discussion started by: Renesh
1 Replies

5. Shell Programming and Scripting

Perl Compare 2 Arrays

Hello, Consider the following 2 arrays: Array1 = qw(Fa0/0 Fa0/1 Fa0/2 Fa0/3); Array1 = qw(Fa0/1 Fa0/2 Fa0/3 Fa0/4); I want to compare the following 2 arrays as follows: Take specific action when elements of Array1 that doesn't exist in Array2 (in my example: Fa0/0). Take another... (4 Replies)
Discussion started by: ahmed_zaher
4 Replies

6. Shell Programming and Scripting

Compare arrays (perl)

Hi, my first post here! Description of my problem: I have one txt-file with six rows and each row contains seven numbers seperated with whitespaces. I want to: Compare one array with seven numbers with each row of numbers in the txt-file. I have managed to compare one array with... (6 Replies)
Discussion started by: mjoh
6 Replies

7. Shell Programming and Scripting

compare 2 arrays in perl

Hi Im supposed to compare lines in a file : KB0005 1019 T IFVATVPVI 0.691 PKC YES KB0005 1036 T YFLQTSQQL 0.785 PKC YES KB0005 1037 S FLQTSQQLK 0.585 DNAPK YES KB0005 1045 S KQLESEGRS 0.669 PKC YES KB0005 1045 S KQLESEGRS 0.880 unsp YES KB204320 1019 T IFVATVPVI 0.699 PKC YES ... (7 Replies)
Discussion started by: karla
7 Replies

8. Shell Programming and Scripting

Compare arrays in perl

Hello, Let's say that we have the two following arrays @array1= @array2= Is there any easy way to compare these two arrays and print the values that exist in array1 and not in array2 and the values that exist in array2 and not in array1? Regards, Chriss_58 (3 Replies)
Discussion started by: chriss_58
3 Replies

9. Shell Programming and Scripting

Perl - Compare 2 Arrays

Hi all, I have the following script where the contents of file1 and file2 would be something like this: file1: 56790,0,0,100998765 89756,0,0,100567876 867645,1,3,678777654 file2: 56790,0,0,100998765 65776,0,0,4766457890 +5896,0,0,675489876 What I then want to do is check if... (4 Replies)
Discussion started by: Donkey25
4 Replies

10. Shell Programming and Scripting

Compare two arrays in sh or compare two fields

I want a soultion to compare two arrays in sh with an easy way.I want a solution to synchrose users between different AIX servers where no NIS is available. All users are meant to be same on all 10 servers. So the approach is to consider first server as master user repository and whatever the users... (0 Replies)
Discussion started by: rijeshpp
0 Replies
Login or Register to Ask a Question

Featured Tech Videos