The management of dependencies among classes is one of the most important (and underappreciated) aspects of object-oriented programming. In this talk I make a case for composition over inheritance and give a brief introduction to dependency injection. I then spend the rest of the talk outlining a step-by-step, Fowler-style method for migrating incrementally from a system built upon static binding of global state to one that uses dependency injection exclusively.
In this talk I share some of my experiences developing a large-scale web crawler using Python and AWS. I give an overview of the Mercator web crawler, share some tips and hard-earned wisdom on implementing Mercator with Python and AWS, and end with some real-world results from our crawls.
Recorded in late 2013/early 2014 while I was playing with a couple of awesome musicians as Little Heart. I played the lead guitar parts, wrote some of them, and coiled and uncoiled a lot of microphone cables.