brweber2

defmodule Benum do
  defimpl Enumerable, for: BitString do
    def count(collection) when is_binary(collection) do
      {:ok, Enum.reduce(collection, 0, fn v, acc -> acc + 1 end)}
    end
    def count(collection) do
      {:error, __MODULE__}
    end
    def member?(collection, value) when is_binary(collection) do
      {:ok, Enum.any?(collection, fn v -> value == v end)}

brweber2

defmodule Permutations do

  @moduledoc """

    An answer to the problem from: http://www.theguardian.com/science/alexs-adventures-in-numberland/2015/may/20/can-you-do-the-maths-puzzle-for-vietnamese-eight-year-olds-that-has-stumped-parents-and-teachers

    iex> Permutations.main parallel: false

    iex> Permutations.main parallel: true
  """

brweber2

# Create a variable has_seen_star_wars and set it to true.
has_seen_star_wars = true

# Write code that prints "Ready for class" if you have seen at least one Star Wars movie (has_seen_star_wars).
if has_seen_star_wars do
  IO.puts "Ready for class"
end

# Flip has_seen_star_wars to false.
has_seen_star_wars = false

brweber2

defmodule Foo do
 def something() do 
   IO.puts "Foo in here"
  end
end

Foo.something()

brweber2

~/C/C/I/i/i/slacker (master ⚡=) > mix compile
Could not start Hex. Try fetching a new version with "mix local.hex" or uninstalling it with "mix archive.uninstall hex.ez"
** (MatchError) no match of right hand side value: {:error, {:ssl, {'no such file or directory', 'ssl.app'}}}
    (hex) lib/hex.ex:5: Hex.start/0
    (mix) lib/mix/hex.ex:53: Mix.Hex.start/0
    (mix) lib/mix/dep/loader.ex:144: Mix.Dep.Loader.with_scm_and_app/4
    (mix) lib/mix/dep/loader.ex:99: Mix.Dep.Loader.to_dep/3
    (elixir) lib/enum.ex:1184: Enum."-map/2-lists^map/1-0-"/2
    (mix) lib/mix/dep/loader.ex:299: Mix.Dep.Loader.mix_children/1
    (mix) lib/mix/dep/loader.ex:18: Mix.Dep.Loader.children/0

brweber2

Elixir

Meetups

• Where are the meetups?
• What is the closest meetup to {City}?
• When is the next meetup in {City}?

Conferences and Training

• What are the upcoming conferences?
• What training is available?

brweber2

defmodule Cats do

  @base_dir "cats"

  def run() do
    process_type = :link # :monitor
    pid = start(process_type) |> IO.inspect
    IO.puts "time to send Thomas #{inspect pid}"
    send pid, {self, "Michigan", "Thomas"}
    pid = receive do

brweber2

defmodule Cats do

  @base_dir "cats"

  def run() do
    pid = start()
    send pid, {self, "Virginia", "Felix"}
    receive do
      resp -> IO.puts "Virginia/Felix: #{inspect resp}"
    after 5000 ->

brweber2

defmodule Macros do
  defmacro or_default(expr, default) do
    quote do
      try do
        unquote(expr)
      rescue
        e ->
          unquote(default)
      end
    end

brweber2

defmodule JavaClassVersion do

  def read_class_file(file) do
    file
    |> File.read!()
    |> java_major_minor()
    |> java_version()
    |> IO.inspect()
  end