Use array variable in awk?

Question

A=(aaa bbb ccc)    
cat abc.txt | awk \'{ print $1, ${A[$1]} }\'

I want to index an array element based on the $1, but the code above is not correc

Answer 1

You can also print each element of the array on separate line with printf and pipe it to awk. This code will simply print bash array (bash_arr) from awk:

bash_arr=( 1 2 3 4 5 )
printf '%s\n' "${bash_arr[@]}" | 
    awk '    { awk_arr[NR] = $0 }
         END {
             for (key in awk_arr) {
                 print awk_arr[key]
             }
         }'