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Hi,
I found one solution.
The space difference between individual elements in file.txt is the key.
while IFS=" " read -r line
do
for i in ${!line}
do
echo "$i"
done
done <...

How to get all the values for array defined in each line?

I have one file where at every line an array is defined.
Example:
file.txt
a=(1 2 3)
b=(4 5 6)
c=(7 8 9)

I have another file file1.txt where the variables are defined
a
b
c

in the...