Setup environment

Install cargo

cargo is package manager of Rust. It is same as npm or yarn of JavaScript.

Open terminal, put following command and follow the process.

$ curl https://sh.rustup.rs -sSf | sh

Select "1" When Showing up following.

Current installation options:

   default host triple: x86_64-apple-darwin
     default toolchain: stable
  modify PATH variable: yes

1) Proceed with installation (default)
2) Customize installation
3) Cancel installation

• Don't forget adding path of cargo showing up on terminal.
• After finishing this process, you can use cargo command.

Run main program

$ cargo run

To run programs.

• Add main.rs in src directory.
• Create function named main in main.rs.
  • "fn main {}" is a entry point.

Run test

$ cargo test

• A function that is annotated with #[test] is executed as a test code when running $ cargo test.
• Put the annotation before fn keyword.

Basic Requirements

• Translate below JavaScript code into Rust.
  • In order to run your program with cargo run, you need to create main.rs and a function named main in the file.
  • Hint: If you stuck with something from above code, you can refer slides of this lecture.
• Difine type of return value and arugments on each function/method.
• Write tests for each function/method.
  • Hint: Do you remember annotation for tests.
  • How to Write Tests

function main() {
  const number_1 = 1;
  console.log(number_1);

  let number_2 = 1;
  number_2 += 1;
  console.log(number_2);

  const number_3 = add(1, 2);
  console.log(number_3);

  output('this is input value');

  const person = new Person(
    'Code',
    'Chrysalis',
    2
  );
  console.log(person);
  person.greet();
}

function add(a, b) {
  return a + b;
}

function output_string(input) {
  console.log(input);
}

class Person {
  constructor(firstName, lastName, age) {
    this.firstName = firstName;
    this.lastName = lastName;
    this.age = age;
  }

  greet() {
    console.log(
      "My name is %s %s. I'm %d years old.",
      this.firstName,
      this.lastName,
      this.age
    );
  }
}

Advanced Requirements.

• Separate functions and a struct into other files.
  • Hint: Crates and Modules
• Serialize and deserialize your person instance with Serde.
  • add dependencies in Cargo.toml.
    • see crates.io
  • Output person information on your console with println!.
• Create an array.(vector) of person instances and print each information with for in loop.
  • To output a person information, use Serde and derive what you need from Serde.

Resources

• Slides for today's lecture
• Install Rust
• How to Write Tests
• Serde
• Vectors
• Crates and Modules
• Example answers
  • When you stuck with requirements, you can see below example answers. But don't copy and paste. Writing code helps you to remember what you learn.
    • For Basic Requirements
    • For Advanced Requirements