kblake

function parse_git_dirty {
  [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit, working tree clean" ]] && echo "*"
}
function parse_git_stash {
  [[ $(git stash list 2> /dev/null | tail -n1) != "" ]] && echo "^"
}
function parse_git_branch {
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/\1$(parse_git_dirty)$(parse_git_stash)/"
}
PS1='kman:> \W \[\e[0;36m\]$(parse_git_branch)\[\e[m\] $ '

kblake

PHP: on-boarding new developer

• "Are you asking what tools we'd recommend? I love PhpStorm and HeidiSQL"
• "If the newbie has experience with a few other languages, he/she should be able to pick up PHP on the fly. As such, I would have him/her read all of the documentation for the framework your team uses, i.e. Laravel, Symphony, etc. Reading through these framework docs will not only give the newbie an idea of PHP's syntax, but also a head start on understanding how your framework functions. There are so many good articles and videos on Laravel, for example. and I would be remiss if I didn't mention the PSR documentation at php-fig.org."
• "Honestly the documentation for Laravel is so good that I would seriously consider starting there."
• "If they have no php and minimal development background: https://www.amazon.com/Wicked-Cool-PHP-Real-World-Difficult/dp/1593271735"
• "It's not modern but it's a quick, results oriented way to get moving. After they have some basis they can move into small projects

kblake

Phoenix and React Resources

• https://medium.com/@diamondgfx/phoenix-v1-1-2-and-react-js-3dbd195a880a#.9v6fcp4as
• https://github.com/slashdotdash/phoenix-react-redux-example
• https://github.com/bigardone/phoenix-trello
• https://www.viget.com/articles/phoenix-and-react-a-killer-combo
• https://blog.diacode.com/building-a-simple-chat-using-phoenix-framework-presence-and-react
• https://10consulting.com/2015/11/18/phoenix-react-redux-example/
• http://blog.overstuffedgorilla.com/render-react-with-phoenix/
• https://www.learnphoenix.io/#/?_k=3hm6q6

kblake

defmodule ExpensiveOperationWorker do
  # recursion and pattern matching
  def process([head | tail]) do
    operation_passed?(head) && process(tail)
  end
  def process([]), do: true

  # Enum.reduce_while
  def process_operations(operations) do
    Enum.reduce_while(operations, true, fn number, acc ->

kblake

#Elixir chat client & functional programming talk outline http://www.meetup.com/dev-coop/events/232116993/

• Review previous weeks
  • https://github.com/kblake/functional-programming
  • Functional Programming
    • OOP has lead to complex software patterns
    • Multicore, distributed, concurrent world
    • Functions: pure, no side-effects, deterministic
    • Immutability: known data, copy and alter, avoid race-conditions

kblake

defmodule ChatClient do
  @server_name :chat_server

  def hello do
    IO.puts "hello world!!!"
  end

  def join_server server_id, cookie \\ :"cookiemonster" do
    Node.set_cookie(Node.self, cookie)
    pid = spawn(__MODULE__, :message_listener, [])

kblake

• http://neuralnetworksanddeeplearning.com/index.html
• https://en.wikipedia.org/wiki/Backpropagation
• http://yann.lecun.com/exdb/publis/pdf/lecun-98b.pdf
• http://page.mi.fu-berlin.de/rojas/neural/chapter/K7.pdf
• http://andrew.gibiansky.com/blog/categories/machine-learning/
• http://natureofcode.com/book/chapter-10-neural-networks/
• http://www.andreykurenkov.com/writing/a-brief-history-of-neural-nets-and-deep-learning/
• http://whiteboard.ping.se/MachineLearning/BackProp
• https://github.com/jostmey/DeepNeuralClassifier#theory
• https://en.m.wikipedia.org/wiki/Delta_rule

kblake

Read more here:

http://www.benjaminoakes.com/2013/10/15/superclass-mismatch-when-inheriting-from-struct-new/
http://thepugautomatic.com/2013/08/struct-inheritance-is-overused/
http://idiosyncratic-ruby.com/18-con-struct-attributes.html#why-not-structs-everywhere
https://twitter.com/joshsusser/status/365286610578849794

kblake

test_scores = [88, 100, 93, 65, 89, 90, 78, 99, 54]

If given an array of integers, display a horizontal histogram using ‘*’

For example, 

Produce:

88 : ****************************************************************************************

kblake

IO.puts "Conway's Game of Life"

defmodule Cell do
  def next_cycle do
    receive do
      {sender, number_live_neighbors} ->
        cond do
          number_live_neighbors < 2 -> 
            send sender, {:died, die_off}
          number_live_neighbors > 3 ->