tenderlove

module Visitable
  def accept object
    object.visit self
  end
end

class Visitor
  def visit thing
    send(:"visit_#{thing.class.name}", thing)
  end

wycats

class Object
  def send_through(object, *args)
    object.dispatcher_for(self).call(self, *args)
  end
end

module Dispatcher
  class DispatcherNotFound < StandardError; end

  def self.extended(klass)

mike-burns

class User < Params.over(:first_name, :last_name)
  def info
    "I am a user: #{@first_name} #{@last_name}"
  end
end

class Admin < User.params(:awesomeness_level)
  def info
    "I am a level #{@awesomeness_level} admin: #{@first_name} #{@last_name}"
  end

jessegrosjean

var copyProperties = require('react/lib/copyProperties'),
    Dispatcher = require('flux').Dispatcher,
    util = require('util');

function AppDispatcher() {
    Dispatcher.call(this);
    this._queue = [];
}

util.inherits(AppDispatcher, Dispatcher);

smsohan

Because I think the hardest part of getting started with AngularJS is it's esoteric names, I'm suggesting the following replacements of the AngularJS terminology.

scope -> state

factory -> data/models

filter -> helper

directive {restrict: 'E'} -> custom_tag
directive {restrict: 'A'} -> custom_attribute

olivierlacan

# switch default editor for pry to sublime text
Pry.config.editor = "sublime"

# format prompt to be <Rails version>@<ruby version>(<object>)>
Pry.config.prompt = proc do |obj, level, _|
  prompt = "\e[1;30m"
  prompt << "#{Rails.version} @ " if defined?(Rails)
  prompt << "#{RUBY_VERSION}"
  "#{prompt} (#{obj})>\e[0m"
end

hardbap

# Orignal instructions here: https://kkob.us/2016/01/09/homebrew-and-postgresql-9-5/

1. Stop postgresql
    $ launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist

2. Install postgresql 9.5
    $ brew update && brew upgrade postgresql

3. Make a new 9.5 database
    $ initdb /usr/local/var/postgres9.5 -E utf8

rweald

class SimpleLinearRegression
  def initialize(xs, ys)
    @xs, @ys = xs, ys
    if @xs.length != @ys.length
      raise "Unbalanced data. xs need to be same length as ys"
    end
  end

  def y_intercept
    mean(@ys) - (slope * mean(@xs))

adomokos

class CarElement
  def accept(visitor)
    raise NotImpelementedError.new
  end
end

module Visitable
  def accept(visitor)
    visitor.visit(self)
  end

igrigorik

# Convert any YouTube video into an audio file you can listen to on the go, using:
#   http://rg3.github.com/youtube-dl/

{ ~ } > brew install ffmpeg

{ ~ } > wget https://raw.github.com/rg3/youtube-dl/2012.02.27/youtube-dl
{ ~ } > chmod u+x youtube-dl

# Pick which video format you want to download.. (use any YT video link)
{ ~ } > ./youtube-dl -s -F http://www.youtube.com/watch?v=vT1KmTQ-1Os