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How best to correlate the variables in two arrays?

Posted on 2015-01-06
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Last Modified: 2015-01-07
I want to correlate the variables in two arrays.  What's the simplest way of doing this?  I presume using index?  I'd also like to confirm that they both contain the same quantity of elements.

E.g. for below 10.10.12.16 correlates to 04 etc.

STORAGE=(10.10.12.16 10.10.12.20 10.10.12.22)
LVM=(04 07 08)

for i in ${STORAGE[@]}
do
echo $i >> file.txt
echo CORRESPONDING_LVM_VALUE >> file.txt
done
0
Comment
Question by:mickt
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6 Comments
 
LVL 68

Accepted Solution

by:
woolmilkporc earned 2000 total points
ID: 40533355
Yes, use an index:

#!/bin/bash
STORAGE=(10.10.12.16 10.10.12.20 10.10.12.22)
LVM=(04 07 08)

if [[ ${#STORAGE[@]} -ne ${#LVM[@]} ]]; then
 echo "Number of elements doesn't match"
 exit
fi

n=0
while [[ n -lt ${#STORAGE[@]} ]]
 do
  echo ${STORAGE[n]} >> file.txt
  echo ${LVM[n]} >> file.txt
  ((n++))
 done
0
 

Author Comment

by:mickt
ID: 40533384
Cheers

And the 2nd part of question similar to the following:

if [ ${#STORAGE[@]} != ${#LVM[@]} ]
  then
    echo "STORAGE and LVM arrays do not contain the same quantity of elements.  Exiting."
    exit 1

fi
0
 

Author Comment

by:mickt
ID: 40533390
Sorry, missed your first section :).  cheers again.
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LVL 68

Expert Comment

by:woolmilkporc
ID: 40533410
Why grade B? Did you find my solution incomplete?
0
 

Author Comment

by:mickt
ID: 40533414
Not at all, very good solution.  Wasn't paying attention.  Can I change it?
0
 
LVL 68

Expert Comment

by:woolmilkporc
ID: 40533434
Click "Request Attention" and ask the mods to reopen the question.
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