davekonopka

Philadelphia Emerging Technologies for the Enterprise conference, April 2010

Day 1

Keynote - Bad Code, Craftsmanship, Engineering, and Certification, Bob Martin

• The only way to go fast is to go well.
• Keep functions as short, single function as possible
• Function is small enough when it can't get any smaller
• Keep argument collection small

davekonopka

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davekonopka

Polymorphic Associations reversed

It's pretty easy to do polymorphic associations in Rails: A Picture can belong to either a BlogPost or an Article. But what if you need the relationship the other way around? A Picture, a Text and a Video can belong to an Article, and that article can find all media by calling @article.media

This example shows how to create an ArticleElement join model that handles the polymorphic relationship. To add fields that are common to all polymorphic models, add fields to the join model.

davekonopka

namespace :site do

  desc "Middleman build"
  task :build do
    puts "Building site..."
    puts `bundle exec middleman build --verbose`
  end

  desc "Build, deploy, bust cache"
  task :deploy => ["site:build", "s3:deploy", "fastly:bust_cache"]

davekonopka

if defined?(RUBY_ENGINE) && RUBY_ENGINE == "ruby" && RUBY_VERSION >= "1.9"
  module Kernel
    alias :__at_exit :at_exit
    def at_exit(&block)
      __at_exit do
        exit_status = $!.status if $!.is_a?(SystemExit)
        block.call
        exit exit_status if exit_status
      end
    end

davekonopka

echo "##teamcity[setParameter name='env.SEED_NUMBER' value='$(git rev-parse HEAD | tr -d 'a-z' | cut -b 1-5)']"

echo "To replicate the order on your machine:"
echo "rake spec SPEC_OPTS=\"--order random:$(git rev-parse HEAD | tr -d 'a-z' | cut -b 1-5)\""

davekonopka

[18:48:01][Step 3/6] To replicate the order on your machine: 
[18:48:01][Step 3/6] rake spec SPEC_OPTS=“–order random:84847”

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input = "If you are self-motivated, wow, this world is tailored for you. The boundaries are all gone. But if you're not self-motivated, this world will be a challenge because the walls, ceilings and floors that protected people are also disappearing. That is what I mean when I say \"it is a 401(k) world.\" Government will do less for you. Companies will do less for you. Unions can do less for you. There will be fewer limits, but also fewer guarantees. Your specific contribution will define your specific benefits much more. Just showing up will not cut it. - T. Friedman".downcase
pair = "ou"
third = "r"

pairs = (0..input.length-2).inject({}) do |h,i|
   key, val = input[i,2], input[i + 2]
   h[key] = {} unless h[key]
   h[key][val] = (h[key][val] || 0) + 1 if val
   h
end

davekonopka

                        ]
                      ]
                    }
                  ]
                }
              ]
            }
          }
        ]
      }

davekonopka

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console