mike-burns

class Monoid
  attr_accessor :value
  def initialize(value)
    @value = value
  end

  def self.base
    new(const_get(:BASE))
  end

mike-burns

#!/bin/sh

entry_text=`pwd`
location=`zenity --file-selection --directory --filename=$entry_text --title="Open location"`

if [ "x$?" = "x0" ]; then
  xdg-open "$location"
fi

mike-burns

module IsFibber
  def fibonacci?(n)
    perfect_square?(5 * n * n + 4) || perfect_square?(5 * n * n - 4)
  end

  private

  def perfect_square?(f)
    sqrt = Math.sqrt(f)
    sqrt == sqrt.round

mike-burns

#!/bin/sh
desktop=`xdotool get_desktop`
window=`xdotool search --onlyvisible --all --desktop $desktop --class gnome-terminal | head -1`
xdotool windowactivate --sync $window type "$@
"
xdotool windowactivate --sync $window key Return

mike-burns

class Literal < Struct.new(:number)
  def show
    print number
  end
end

class Add < Struct.new(:a, :b)
  def show
    a.show
    print ' + '

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

mike-burns

Mike Burns

Contact details

• Email: mburns@thoughtbot.com
• Twitter: @mikeburns
• Website or Blog: http://mike-burns.com
• Company: thoughtbot

Speaker bio

mike-burns

Array.prototype.groupBy = function(f) {
  var hash = {};
  this.forEach(function(e) {
    var result = f(e);
    if (hash[result] == undefined)
      hash[result] = [];
    hash[result].push(e);
  });
  return hash;
}

mike-burns

interface List a implements Functor List, Applicative List, Monad List {
  def filter(Lambda1 a Boolean) :: List a
}

interface Functor f {
  def map(Lambda1 f[0] b) :: f b
}

interface Applicative f implements Functor Applicative {
  def self.wrap(b) :: f b

mike-burns

pipe :: [ a -> a ] -> a -> a
pipe [] xs = xs
pipe (f:fs) xs = pipe fs $ f xs