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#!/usr/bin/env ruby

require './dancer'
require './gangnam_style'

dancer = Dancer.new('PSY', GangnamStyle.new)
dancer.dance!

ernie

#!/usr/bin/env ruby

require './injection'
require 'pry'

class CallTracker < BasicObject
  attr_reader :tracked_calls

  def initialize
    @tracked_calls = ::Hash.new { |h, k| h[k] = 0 }

ernie

#!/usr/bin/env ruby
# http://www.ruby-doc.org/core-1.8.7/classes/Object.html#M000006 :
#
# obj.instance_exec(arg...) {|var...| block } => obj
#
# Executes the given block within the context of the receiver (obj).
# In order to set the context, the variable self is set to obj while
# the code is executing, giving the code access to obj‘s instance variables.
# Arguments are passed as block parameters.

ernie

#!/usr/bin/env ruby
#
# $ ./wth_mysql.rb
#                 user     system      total        real
# mysql       0.020000   0.010000   0.030000 (  0.617876)
# sqlite      0.000000   0.000000   0.000000 (  0.001234)
# postgresql  0.000000   0.000000   0.000000 (  0.002423)

srand 123456789
require 'active_record'

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# If you put a DSL stub object like this inside an array and call array#flatten without
# being sure to call super on :to_ary, you get fun stuff like this:
# can't convert Squeel::Nodes::Stub to Array 
# (Squeel::Nodes::Stub#to_ary gives Squeel::Nodes::KeyPath)
def method_missing(method_id, *args)
  super if method_id == :to_ary
  if args.empty?
    KeyPath.new(self, method_id)
  elsif (args.size == 1) && (Class === args[0])
    KeyPath.new(self, Join.new(method_id, Arel::InnerJoin, args[0]))

ernie

============================================================
Benchmarking with Ruby 1.9.3 and ActiveRecord 3.2.0.beta
============================================================
              user     system      total        real
============================================================
RSS     : 31432k (31432k)
Objects : 102195 (102195)
============================================================

SINGLE-VALUE TEST

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====================
3.0.10
====================
           user     system      total        real
============================================================
RSS     : 37592k (37592k)
Objects : 182328 (182328)
============================================================
all    0.650000   0.010000   0.660000 (  0.682556)
============================================================

ernie

rs = (0..10000).to_a.sample(30)

rs.each do |r|
  case r
  when :zero?.to_proc then puts "#{r} is zero"
  when :even?.to_proc then puts "#{r} is even"
  when :odd?.to_proc then puts "#{r} is odd"
  else
    raise 'unpossible'
  end

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module Enumerable
  def any?(&block)
    self.each do |v|
      return true if yield(v)
    end

    false
  end
end

ernie

require 'benchmark'

haystack = (1..1_000_000).to_a
needles = 1.upto(100).map {|n| n * 10_000}

module EachDetector
  def self.find(haystack, needle)
    haystack.each do |v|
      return true if v == needle
    end