如何使用bash函数获取数组中元素的索引

get_index() {
  local array=("$@")
  local element=$1
  local index=-1

  for i in "${!array[@]}"; do
    if [[ "${array[$i]}" == "$element" ]]; then
      index=$i
      break
    fi
  done

  echo $index
}

my_array=("apple" "banana" "orange" "grape")
element="orange"

index=$(get_index "${my_array[@]}" "$element")
echo "The index of $element is $index"

The index of orange is 2