#!/usr/bin/env bash
awk `
  BEGIN {
    arr[A]=1;
    arr[B]=1;
    arr[C]=1;
    arr[E]=1;
    arr[J]=8;
    arr[Q]=10;
    print arr[J]
  }`

the above command outputs the latest set value for arr['subscript'], in this case 10 that is value of arr[Q] just before print and not 8 that is the value of arr[J].

Also I want to be able to assign in few line command value to all arr['subscript'] that have same value, and not go assigning them values one by one like in the command above.