kill all processes named argv[1] or at prompt

killem.sh

#!/usr/bin/env bash
if [ -z "$1" ]
  then
    echo "What should I kill?"
    read line
  else
    line="$1"
fi

arr=($(sudo ps -A | grep "$line" | cut -d' ' -f1))
for i in "${arr[@]}"; do
  echo "killing process: $i"
  sudo kill -9 $i
done
arr=($(sudo ps -A | grep "$line" | cut -d' ' -f2))
for i in "${arr[@]}"; do
  echo "killing process: $i"
  sudo kill -9 $i
done