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Following the tradition from last year, here's my complete list of all interesting features and updates I could find in Apple's OSes, SDKs and developer tools that were announced at this year's WWDC. This is based on the keynotes, the "What's New In ..." presentations and some others, Apple's release notes, and blog posts and tweets that I came across in the last few weeks.

If for some reason you haven't watched the talks yet, I really recommend watching at least the "State of the Union" and the "What's New In" intros for the platforms you're interested in. The unofficial WWDC Mac app is great way to download the videos and keep track of what you've already watched.

If you're interested, here are my WWDC 2015 notes (might be useful if you're planning to drop support for iOS 8 now and start using some iOS 9 APIs).

OSX → macOS 10.12 Sierra

This document has moved!

It's now here, in The Programmer's Compendium. The content is the same as before, but being part of the compendium means that it's actively maintained.

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

	platform :ios, '9.0'
	use_frameworks!

	$rxVersion = '~> 2.2.0'

	target 'MyProject' do
	pod 'RxSwift', $rxVersion
	pod 'RxCocoa', $rxVersion
	end

	// Compile with clang -framework Foundation sethack.m

	#import <Foundation/Foundation.h>
	#import <objc/runtime.h>

	/*
	CFHashBytes from http://www.opensource.apple.com/source/CF/CF-1153.18/CFUtilities.c
	*/
	#define ELF_STEP(B) T1 = (H << 4) + B; T2 = T1 & 0xF0000000; if (T2) T1 ^= (T2 >> 24); T1 &= (~T2); H = T1;

	# The trick is to link the DeviceSupport folder from the beta to the stable version.
	# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)

	# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
	sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

	# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions

	# (A similar approach works for older versions too, just change the version number after DeviceSupport)

	// clang -cc1 -analyzer-checker-help
	// OVERVIEW: Clang Static Analyzer Checkers List
	// USAGE: -analyzer-checker <CHECKER or PACKAGE,...>
	//
	// CHECKERS:
	// alpha.core.BoolAssignment Warn about assigning non-{0,1} values to Boolean variables
	// alpha.core.CallAndMessageUnInitRefArg
	// Check for logical errors for function calls and Objective-C message expressions (e.g., uninitialized arguments, null function pointers, and pointer to undefined variables)
	// alpha.core.CastSize Check when casting a malloc'ed type T, whether the size is a multiple of the size of T
	// alpha.core.CastToStruct Check for cast from non-struct pointer to struct pointer

	//
	// SpinlockTestTests.swift
	// SpinlockTestTests
	//
	// Created by Peter Steinberger on 04/10/2016.
	// Copyright © 2016 PSPDFKit GmbH. All rights reserved.
	//

	import XCTest

	cp -R /Applications/Xcode8.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/10.0\ \(14A345\) \
	/Applications/Xcode7.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

	@interface MyStringProxy : NSProxy

	@property (nonatomic) NSString *target;

	@end


	@implementation MyStringProxy

	- (BOOL)respondsToSelector:(SEL)aSelector {

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OSX → macOS 10.12 Sierra

This document has moved!

Effective Engineer - Notes

What's an Effective Engineer?