2015-09-11 thoughtbot Build Phase #89-90 BuildPhase thoughtbot 89: Beginning iOS (Avi Gilligan) | Build Phase thoughtbotter Avi Gilligan geo fence inacurate Amazon.com: Beginning iPhone Development with Swift: Exploring the iOS SDK (9781484204108): David Mark, Jack Nutting, Kim Topley, Fredrik Olsson, Jeff LaMarche: Books 90: Monads, Mo' Problems | Build Phase flatMap (Swift 2) monad