Paolo Leonardi paololeonardi

Build Better Apps with Value Types in Swift

PS: If you liked this talk or like this concept, let's chat about iOS development at Stitch Fix! #shamelessplug

Speaker: David Abrahams. (Tech lead for Swift standard library)

"Crusty" is an old-school programmer who doesn't trust IDE's, debuggers, programming fads. He's cynical, grumpy.
OOP has been around since the 1970's. It's not actually new.
Classes are Awesome
- Encapsulation
- Access control

	# Beyond Crusty: Real-World Protocols

	## Slide 1

	Who here saw last WWDC's talk Protocol-Oriented Programming in Swift? The Crusty talk?

	It is without a doubt the most important Swift talk. You have to watch it. It is probably the best talk I've ever seen at WWDC. And it's entire point is that subclassing is a needless complexity and that the right solution to most problems is protocols. Apple goes so far as to say that Swift is the first Protocol-Oriented Programming language.
	Now, I take some exception to that. I don't think Swift is the first Protocol-Oriented Programming language. I think Go is much more "protocol-oriented" than Swift today, but that's a debate for beer later. Swift clearly is protocol-oriented, and that's great.

	## Slide 2

	let color = "blue"
	let num = 42

	localized("Colorless green ideas sleep furiously.")
	localized("Colorless \(color) ideas sleep furiously.")
	localized("\(num.formatted("%05d")) colorless green ideas sleep furiously.")

	#!/bin/bash
	# Link: <https://gist.github.com/jellybeansoup/db7b24fb4c7ed44030f4>
	#
	# A command-line script for incrementing build numbers for all known targets in an Xcode project.
	#
	# This script has two main goals: firstly, to ensure that all the targets in a project have the
	# same CFBundleVersion and CFBundleShortVersionString values. This is because mismatched values
	# can cause a warning when submitting to the App Store. Secondly, to ensure that the build number
	# is incremented appropriately when git has changes.
	#

	dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
	// I'm the background thread
	dispatch_async(dispatch_get_main_queue()) {
	// I'm the UI thread
	}
	}