rylev

## Sort Algorithms in Elixir

# Selection Sort

defmodule Selection do
  def sort(list) when is_list(list) do
    do_selection(list, [])
  end

  def do_selection([head|[]], acc) do

rylev

Learning Rust

The following is a list of resources for learning Rust as well as tips and tricks for learning the language faster.

Warning

Rust is not C or C++ so the way your accustomed to do things in those languages might not work in Rust. The best way to learn Rust is to embrace its best practices and see where that takes you.

The generally recommended path is to start by reading the books, and doing small coding exercises until the rules around borrow checking become intuitive. Once this happens, then you can expand to more real world projects. If you find yourself struggling hard with the borrow checker, seek help. It very well could be that you're trying to solve your problem in a way that goes against how Rust wants you to work.

rylev

Rust in Large Organizations

Initially taken by Niko Matsakis and lightly edited by Ryan Levick

Agenda

• Introductions
• Cargo inside large build systems
• FFI
• Foundations and financial support

rylev

fn bubble_sort(numbers: &Vec<i64>, compare_fn: |i64, i64| -> i64) -> Vec<i64> {
    let mut temp;
    let mut target = numbers.clone();
    let length = numbers.len();

    for _ in range(0, length) {
        for j in range(0, length - 1) {
            if compare_fn(target[j], target[j+1]) > 0  {
                temp = target[j+1];
                target[j+1] = target[j];

rylev

defmodule User do
  defstruct firstname: "Ryan", lastname: "Levick"

  def full_name(user) do
    user.firstname <> " " <> user.lastname
  end
end

user = %User{}
User.full_name(user) =>

rylev

fn main() {
    let mut sortable: [i32; 5] = [5, 8, 2, 7, 6];
    let length = sortable.len();
    let mut swapped = true;

    print_array(&sortable);

    while swapped {
        swapped = false;
        for i in 1..length {

rylev

use std::collections::HashMap;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let path = std::env::args()
        .skip(1)
        .next()
        .ok_or("Must supply name of file as first argument")?;
    let contents = std::fs::read_to_string(path)?;
    let counter = Counter::new(&contents);

rylev

com::declare! {
    // A COM interface declared here
    #[uuid(...)]
    pub interface IOldSchool {
        fn foo();
        fn bar();
    }

    // A COM class declared here (not defined here)
    #[uuid(...)]

rylev

require "open-uri"
require "json"

PAGE_SIZE=100
NUM_PAGES=1
crates = (1..NUM_PAGES).flat_map do |page|
  res = JSON.parse(URI.parse("https://crates.io/api/v1/crates?keyword=windows&page=#{page}&per_page=#{PAGE_SIZE}").read)
  res["crates"].map {|c| {name: c["name"], repo: c["repository"]} }
end

rylev

First we have FileList which is simply a list of Files. This is an opaque struct that offers a way to iterate over Files and get individual files by index:

#[derive(Debug, Clone)]
struct FileList { ... }

impl FileList {
  fn get(index: usize) -> Option<File> { ... }

  fn len(&self) -> usize { ... }