Jason Duffy writes about software, systems, simplicity, and thoughtful collaboration.https://jasonduffy.com/en-ushttps://jasonduffy.com/blog/2024-09-27-predicting-the-unpredictable/https://jasonduffy.com/blog/2024-09-27-predicting-the-unpredictable/Replacing estimates with data-driven forecastingFri, 27 Sep 2024 00:00:00 GMThttps://jasonduffy.com/blog/2017-07-23-type-erasure/https://jasonduffy.com/blog/2017-07-23-type-erasure/A walkthrough of Swift's type erasure pattern, using Force wielders to show how to put protocols with associated types into a collection.Sun, 23 Jul 2017 00:00:00 GMThttps://jasonduffy.com/blog/2017-02-21-simplicity/https://jasonduffy.com/blog/2017-02-21-simplicity/Why simplicity is a choice that takes hard work: complexity smells to watch for and remedies like value types, functional style, and composition.Tue, 21 Feb 2017 00:00:00 GMThttps://jasonduffy.com/blog/2016-10-26-lsp/https://jasonduffy.com/blog/2016-10-26-lsp/A refactoring kata for practicing the Liskov Substitution Principle, with a rubber-duck example of why composition beats inheritance.Wed, 26 Oct 2016 00:00:00 GMThttps://jasonduffy.com/blog/2016-07-03-ocp/https://jasonduffy.com/blog/2016-07-03-ocp/A refactoring kata for practicing the Open/closed Principle: making changes by writing new code instead of modifying old code.Sun, 03 Jul 2016 00:00:00 GMThttps://jasonduffy.com/blog/2016-06-19-srp/https://jasonduffy.com/blog/2016-06-19-srp/Introducing a refactoring kata for practicing the Single Responsibility Principle, the first in a series on software design principles.Sun, 19 Jun 2016 00:00:00 GMThttps://jasonduffy.com/blog/2016-06-04-flatmap/https://jasonduffy.com/blog/2016-06-04-flatmap/Exploring what Swift's flatMap actually does with nested arrays and optionals, including a few surprises along the way.Sat, 04 Jun 2016 00:00:00 GMThttps://jasonduffy.com/blog/2016-05-26-colemak/https://jasonduffy.com/blog/2016-05-26-colemak/How I learned to touch type in Colemak, why I chose it over Dvorak and Qwerty, and how I made it coexist with pair programming.Thu, 26 May 2016 00:00:00 GMThttps://jasonduffy.com/blog/2016-05-13-to-pair-or-not-to-pair/https://jasonduffy.com/blog/2016-05-13-to-pair-or-not-to-pair/An introvert's honest look at two years of full-time pair programming, with research-backed conclusions about when pairing helps and when it hurts.Fri, 13 May 2016 00:00:00 GMThttps://jasonduffy.com/blog/2016-05-04-first-post/https://jasonduffy.com/blog/2016-05-04-first-post/The obligatory hello-world post: why this blog exists and what I planned to write about.Wed, 04 May 2016 00:00:00 GMT