gistfile1.txt

#!/bin/bash

shopt -s extglob

mapfile -t special_users < specia_users.txt 

printf -v users '%s|' "@(${special_users[@]})"

users=${users%%|}


while read -ra line; do 
  if [[ ${line[0]} = $users ]]; then 
    command wondersharper "${line[1]}" 960 960
  else
    command wondersharper "${line[1]}" 256 256
  fi
done < online_users.txt