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Hash.class_eval do
  def transpose
    reduce({}) do |rmemo, (rk, rv)|
      rv.reduce(rmemo) do |cmemo, (ck, cv)|
        cmemo[ck] ||= {}
        cmemo[ck][rk] = cv
        cmemo
      end
      rmemo
    end

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Interview Outline

Introduction

Code Genome

C, Java, .NET, Clojure

Setup

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SimpleForm::FormBuilder.class_eval do

  def input_with_bs_cols(attribute_name, options = {}, &block)
    bs_cols_classes = parse_bs_cols_option(options)

    if bs_cols_classes
      wrapper_html_options = (options[:wrapper_html] || {})
        .merge_html_attributes(class: bs_cols_classes.join(' '))

      options[:wrapper_html] = wrapper_html_options

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Hash.class_eval do
  def recursive_map_values(&block)
    reduce({}) do |m, (k, v)|
      m[k] = v.is_a?(Hash) ? v.recursive_map_values(&block) : block.call(self, k, v)
      m
    end
  end
end

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module Bacon
  class Resource

    def initialize(name, parent, options = {})
      @name    = name
      @parent  = parent
      @options = options

      @result  = options[:result] || []
    end

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# app/admin/account.rb for toplevel configuration options

ActiveAdmin.register Account do
  config.batch_actions = false
end

# app/admin/account/form.rb

ActiveAdmin.register Account do
  form do |f|

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class Hash
  def as_object
    HashObject.new self
  end
end

#> o = { foo: (->(this) { puts this.bar }), bar: 'hello') }.as_object
#> o.foo
# => hello

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require 'spork'
require 'database_cleaner'

ENV["RAILS_ENV"] ||= 'test'

def configure_rspec
  RSpec.configure do |config|
    config.mock_with :rspec

    config.use_transactional_fixtures = true

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source 'http://rubygems.org/'

gem 'coffee-script'
gem 'compass'
gem 'guard'
gem 'guard-shell'
gem 'haml'
gem 'rb-inotify'
gem 'kramdown'
gem 'nokogiri'

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(defmacro << [k-or-ks f]
  `(fn [state#]
     (update-in state#
                ~(if (vector? k-or-ks)
                   k-or-ks
                   (vector k-or-ks))
                ~f)))

(defn >>* [state form]
  (condp = (first form)