carols10cents

How do I... in cargo

How do I specify a git dependency in my Cargo.toml?

How do I use a crate I have locally in a different directory as a dependency? (path dependency)

How do I add a dependency that is only needed for development?

carols10cents

# code under test, you'll need to know their method name. 
# I've made two here to show the tests passing and failing

class Heart
  def self.some_recursive_method(num)
    if num > 0
      Heart.some_recursive_method(num - 1)
    end
  end

carols10cents

• Slides from my presentation

• The Rust Programming Language - the official book about all of Rust. This is what I recommend starting with if you want to learn Rust. The chapters most relevant to what I talked about are:

  • Ownership
  • References and Borrowing
  • unsafe

• The Rustonomicon - an official book all about writing unsafe Rust. Great deep dive of why and how to write good unsafe code.

• Fearless Concurrency - an official blog post on how safety makes concurrency easier.

• Memory Leaks are Memory Safe - a blog post written by a core team me

carols10cents

• What is Rust?
  • New systems programming language, aiming to replace C & C++
  • Fast, safe, and concurrent
• Bad Things the Rust compiler won't let you do
  • Only one owner, one mutable borrow, one immutable borrow
    • prevents data races
    • prevents use after free
    • prevents double free
  • Uninitialized variables
• No nullable pointers

carols10cents

// The error is that there's an unused generic G declared...
fn foo<G>() -> String {
    String::from("hi")
}

fn main() {
    println!("{}", foo());
    //             ^ but here is where the error message points to:
    // error: unable to infer enough type information about `_`; type annotations or generic parameter binding required [E0282]

carols10cents

enum Atom {
    Number(i32),
}

impl Atom {
    fn eval(&self) -> i32 {
        match *self {
            Atom::Number(n) => n,
        }
    }

carols10cents

Dates in bold are weekends.

May

• 4-6 Railsconf Kansas City
• 6 - Stirtrek, likely
• 7-8 - !!Con, NYC
• 14-15
• 20-21 - Self.conference Detroit
• 21-22

carols10cents

// Make these tests pass by filling in conditionals where the blanks currently are!
// Scroll down for hints :)

pub fn fizz_buzz(i: i32) -> String {
    __________ {
        "FizzBuzz".to_string()
    } ___________ {
        "Fizz".to_string()
    } ___________ {
        "Buzz".to_string()

carols10cents

fn main() {
    // I don't want this to have to be mut.
    let v = vec![1, 2, 3];
    // Not this either.
    let w = vec![3, 4, 5];
    
    // I want a newly allocated vec that is v + w.
    let x = vec_concat(&v, &w);
    
    println!("{:?}", x);

carols10cents

// ----
// libsass (v3.2.5)
// ----

div {
  margin: 0/0/0/0;
  padding: 0 / 0 / 0 / 0;
}