havenwood

#!/usr/bin/env ruby
require "rubygems"
gem "minitest"
require "minitest/autorun"
require "minitest/pride"

class Palindrome
  def search string
    @array = string.gsub(/[^0-9a-z ]/i, '').gsub(' ', '').downcase.split ''
    @palindromes = []

havenwood

class Dog
  attr_accessor :age

  def dog_years
    return "Gimme a human age first, damnit..." unless @age
    @dog_years = 15
    @dog_years += 9 if @age > 1
    @dog_years += (@age - 2) * 4 if @age > 2
    @dog_years
  end

havenwood

def self.something
  :red
end

something #=> :red

defined? something #=> "method"

something = :blue   # then local variable hijacks something, oh noes

havenwood

require 'set'
symptoms = Set["bezoars", "turning purple", "jaundice"]
gvhd = Set["jaundice", "bloody diarrhea", "skin inflammation"]

"whipple" if gvhd.proper_subset? symptoms

havenwood

symptoms = ["bezoars", "turning purple", "jaundice", "bloody diarrhea", "skin inflammation"]
gvhd = ["jaundice", "bloody diarrhea", "skin inflammation"]

gvhd.all? { |symptom| symptoms.include? symptom }

havenwood

def x
  :a_method
end

x # => :a_method

x = :a_variable

x # => :a_variable

havenwood

require 'minitest/autorun'
require 'minitest/pride'

class Integer
  def ordinalize
    suffix = if (abs % 100).between? 11, 13
      'th'
    else
      case abs % 10
      when 1; 'st'

havenwood

class String
  def say
    puts self
  end
end

%w[cats vanilla trees].each(&:say)

#=>
cats

havenwood

def puts(*a)
  $stdout.puts(*a)
  nil
end

def puts(*args)
  if args.empty?
    write DEFAULT_RECORD_SEPARATOR
  else
    args.each do |arg|

havenwood

def fun(&block)
  @block = proc { yield }
end

fun { puts "How is this fun?" }

@block.call  #=> How is this fun?