Function for checking if something is in the path

in_path.sh

#!/bin/bash

in_path () {
  IS_IN_PATH=1
  if [ -n "$1" ]
  then
    command -v $1 >/dev/null 2>&1 || { IS_IN_PATH=0; }
  fi
  return ${IS_IN_PATH}
}
in_path $1
IN_PATH=$?
echo $IN_PATH