Follow these steps to get through this recipe:

1. Create a file named sample_multiple_err.rs and open it in your text editor.
2. Write the code header with the relevant information:

        //-- #########################
        //-- Task: Handling multiple errors
        //-- Author: Vigneshwer.D
        //-- Version: 1.0.0
        //-- Date: 26 March 17
        //-- #########################

3. Define a generic alias named Result<T> for the std::result::Result<T, String> type:

        type Result<T> = std::result::Result<T, String>;

4. Create a function named double_first that will accept the Vec input and return a Result<i32> type:

        fn double_first(vec: Vec<&str>) -> Result<i32> {
          vec.first()
          .ok_or("Please use a vector with at least one
          element.".to_owned())
          .and_then(|s| s.parse::<i32>()
          .map_err(|e| e.to_string())
          .map(|i| 2 * i))
        }

5. Create a function named print that will accept a Result<i32> type as input:

        fn print(result: Result<i32>) {
          match result {
            Ok(n) => println!("The first doubled is {}", n),
            Err(e) => println!("Error: {}", e),
          }
        }

6. Define the main function and call the different functions:

        fn main() {
          let empty = vec![];
          let strings = vec!["tofu", "93", "18"];

          print(double_first(empty));
          print(double_first(strings));
        }

You will get the following output upon successful execution of the code: