How to store command return values in bash array

Question

I have a command which upon execution return me set of numbers which I want to store in a bash array.

    vihaan@trojan:~/trash$ xdotool search brain 
Defaulting to search window name, class, and classname
52428804
50331651
62914564
65011896
48234499

How do I store these values in an array ?

Answer 1

In this simple case:

array=( $(xdotool search brain) )

If the output were more complicated (for example, the lines might have spaces in them), you can use the bash builtin mapfile:

mapfile -t array < <(xdotool search brain)

(help mapfile for more information)

Answer 2

declare -a myarr  # declare an array
myarr=($(grep -v "Defaulting" $(xdotool search brain) | awk '{printf $1" "}'))  # Fill the array with all the numbers from the command line
echo ${myarr[*]}  # echo all the elements of the array

OR

echo ${myarr[1]}  # First element of the array