bash assign variable to array elements

Question

I'm having a trouble getting this working in bash, I have the following array

server-farm=("10.0.10.1" 10.0.10.2")

I would like to loop through this array and assign uniq variable to each element.

Desired results.

srv1 = 10.0.10.1 
srv2 = 10.0.10.2

Is this possible?

This is what I have tried so far, but couldn't get it to work.

  for i in "${server_farm[@]}"
    do
            echo $i
  done

Thank you

Why do you want to assign each value to a different variable? There's no need to do that. Use the array directly. ${server_farm[0]} is the first entry, ${server_farm[1]} is the second, etc. — John Kugelman
– John Kugelman, Commented Feb 19, 2015 at 20:27
bash variables can't have hyphens in their names. So your array assignment is a bit suspect to begin with... — twalberg
– twalberg, Commented Feb 19, 2015 at 21:49

anubhava · Accepted Answer · 2015-02-19 20:31:00Z

1

You can use this script:

server_farm=("10.0.10.1" "10.0.10.2")

for ((i=0, j=1; i< ${#server_farm[@]}; i++, j++)); do
   declare "srv$j"="${server_farm[$i]}"
done

Test:

echo "$srv1"
10.0.10.1
echo "$srv2"
10.0.10.2

answered Feb 19, 2015 at 20:31

anubhava

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2 Comments

Thanks very much, what is the meaning of the # before server_farm? Just curious to know, thanks

${#server_farm[@]} gives us count of array elements