Sponsored Content
Full Discussion: Compare two arrays
Top Forums Shell Programming and Scripting Compare two arrays Post 302765843 by zaxxon on Sunday 3rd of February 2013 03:51:15 PM
Old 02-03-2013
Here is an example how you could cycle and compare array elements (example with integers) and print only those from array 1, which are not in array 2:
Code:
$ cat ./mach.ksh
#!/usr/bin/ksh

set -A ARR1 4 1 3 2
set -A ARR2 5 6 2 7 4 8

MAX=$((${#ARR2[*]}-1))

for a in ${ARR1[*]}; do
        COUNT=0
        set -A HITS
        for b in ${ARR2[*]}; do
                (( $a != $b )) && \
                HITS[$COUNT]=$a && \
                let COUNT+=1
        done
        (( ${#HITS[*]} != $MAX )) && \
        print ${HITS[0]}
        unset HITS
done

exit 0

$ ./mach.ksh
1
3

Somehow there is a blank line at the end. Didn't find where it comes from Smilie

Maybe other people have more efficient algorithm to do this which would be interessting for me too.

If you have 2 files with the lists of files you might want to compare, a grep -f file1 file2 or grep -vf file1 file2 might be more efficient than my example.
 

10 More Discussions You Might Find Interesting

1. 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

2. 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

3. Shell Programming and Scripting

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... (3 Replies)
Discussion started by: draco
3 Replies

4. 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

5. 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

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

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

8. 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

9. Shell Programming and Scripting

Bash arrays that compare ip addresses.

I've been trying to have an array of ip addresses go through a loop one at a time. Then compare if the current element is in another array of ip addresses. I've traced my error with /bin/bash -x + for c in '"${ip}"' ./netk5: line 65: 50.17.231.23 23.64.146.110 23.64.159.139 107.14.36.129... (17 Replies)
Discussion started by: Azrael
17 Replies

10. 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
ARRAY_INTERSECT_KEY(3)							 1						    ARRAY_INTERSECT_KEY(3)

array_intersect_key - Computes the intersection of arrays using keys for comparison

SYNOPSIS
array array_intersect_key (array $array1, array $array2, [array $...]) DESCRIPTION
array_intersect_key(3) returns an array containing all the entries of $array1 which have keys that are present in all the arguments. PARAMETERS
o $array1 - The array with master keys to check. o $array2 - An array to compare keys against. o $... - A variable list of arrays to compare. RETURN VALUES
Returns an associative array containing all the entries of $array1 which have keys that are present in all arguments. EXAMPLES
Example #1 array_intersect_key(3) example <?php $array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4); $array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8); var_dump(array_intersect_key($array1, $array2)); ?> The above example will output: array(2) { ["blue"]=> int(1) ["green"]=> int(3) } In our example you see that only the keys 'blue' and 'green' are present in both arrays and thus returned. Also notice that the values for the keys 'blue' and 'green' differ between the two arrays. A match still occurs because only the keys are checked. The values returned are those of $array1. The two keys from the key => value pairs are considered equal only if (string) $key1 === (string) $key2 . In other words a strict type check is executed so the string representation must be the same. SEE ALSO
array_diff(3), array_udiff(3), array_diff_assoc(3), array_diff_uassoc(3), array_udiff_assoc(3), array_udiff_uassoc(3), array_diff_key(3), array_diff_ukey(3), array_intersect(3), array_intersect_assoc(3), array_intersect_uassoc(3), array_intersect_ukey(3). PHP Documentation Group ARRAY_INTERSECT_KEY(3)
All times are GMT -4. The time now is 07:21 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy