The concept of a killer app is not new. The software industry is driven by the quest for the killer app. You could say Rails is the killer app for Ruby, Datomic is the killer app for Clojure and so on. Similarly, Communities of Practice (CoP) are the killer app for learning and career growth. What Are Communities of Practice? “Communities of practice are groups of people who share a concern or a passion for something they do and learn how to do it better as they interact regularly.

Clojure Journey is a mini-series on my experience and the fun that ensues from learning the Clojure programming language. On Day 1, I try to wrap my head around basic functions.

There are infinite choices that we’re making all day long and trying to apply some rule to all these choices is difficult. These rules don’t apply to everything. Be intelligent when to use them. 1. When faced with a difficult choice, if you cannot decide, the answer is no. Some decisions can be really long lived. It’s really important to only say yes when you’re pretty certain. You’re never gonna be absolutely certain, but you can be very positive.

Android is a system that can run more than one application at the same time. When you play games, you may get an email notification or a DM on Twitter or your apps might be updating in the background. To enable this, memory and CPU time need to be divided among multiple applications.

I was exposed to Domain Driven Design in 2014 or so, almost 10 years after the book was written by Eric Evans, on one of the major products I was working on back then. I’ve found it quite beneficial for figuring out the problem domain and writing maintainable Android apps.

So debounce is a pretty cool operator in Rx. When you want to emit an item only after a certain amount of time has passed, debounce does that in a pretty simple way..

Lazy inflate hidden views! #perfmatter. Toggling Visibility.. I’ve always had to deal with layouts that are GONE by default and are made VISIBLE based on certain conditions.

Android Gotchas is a mini-series on the quirks and idiosyncrasies of Android app development.

Make sense of that long function. SLAP it! (Single Level of Abstraction Principle)

Leave the code cleaner than you found it.