ityonemo

A half-hour to learn Zig

This is inspired by https://fasterthanli.me/blog/2020/a-half-hour-to-learn-rust/

Basics

the command zig run my_code.zig will compile and immediately run your Zig program. Each of these cells contains a zig program that you can try to run (some of them contain compile-time errors that you can comment out to play with)

epfahl

# Discussed in https://www.ericpfahl.com/from-pattern-matching-to-unification/

defmodule Var do
  alias Var

  @type t :: %Var{id: any}
  defstruct [:id]

  @spec new(any) :: Var.t()
  def new(id), do: %Var{id: id}

epfahl

defmodule Exp do
  def draw() do
    x = :rand.uniform()
    draw(x, x, 1, 0)
  end

  defp draw(x, u, n, k) do
    u_next = :rand.uniform()

    if u > u_next do

epfahl

defmodule PLF do
  @doc """
  Given a list of `{x, y}` nodes that the function must pass through, return
  a function any input `x`.

  For inputs less than the minimum `x` values among the nodes, extrapolate 
  with a constant equal to the `y` value of the min-`x` node. Similar
  extrapolation occurs for `x` larger than the max-`x` node.

  Note: When the number of nodes is large, this can be made more efficient