Bash function to translate redis commands to their pipelined equivalent

Bash function to translate redis commands to their pipelined equivalent
eg.

$ redis_p HMSET key value key1 value1
*5
$5
HMSET
$3
key
$5
value
$4
key1
$6
value1
$

function redis_p() {
  declare ARR=(${@:-$(</dev/stdin)})
  OUTPUT="*${#ARR[@]}\r\n"
  for a in "${ARR[@]}"; do
    OUTPUT+="\$${#a}\r\n${a}\r\n"
  done
  echo -ne $"${OUTPUT}"
}```