Alex Pretzlav Pretz

How to flash Adam Image on GCW Zero

You need Linux for that.

Download latest PGv1 Release Image
Unpack xz: xz -d adam_v2.1_PGv1.img.xz, you'll have adam_v2.1_PGv1.img in the same directory
Split image into MBR, bootloader, system partition, data partition:
- dd if=adam_v2.1_PGv1.img bs=512 count=1 of=mbr.bin
- dd if=adam_v2.1_PGv1.img bs=512 skip=1 count=30 of=bootloader.bin

sudo losetup --show -Pf adam_v2.1_PGv1.img

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.
Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

Here's my own list of the interesting stuff announced during this year's WWDC, collected from the keynotes, various Apple docs, blog posts and tweets.

If you're planning to watch the videos, I really recommend this Mac app that helps you download and watch them: https://github.com/insidegui/WWDC.

OS X El Capitan

http://www.apple.com/osx/elcapitan-preview/

split view - two apps side by side on full screen

	{
	"indentBlankLines": false,
	"indentConditionalCompilationBlocks": false,
	"indentSwitchCaseLabels" : false,
	"indentation": {
	"spaces": 4
	},
	"lineBreakAroundMultilineExpressionChainComponents": true,
	"lineBreakBeforeControlFlowKeywords": false,
	"lineBreakBeforeEachArgument": true,

	import Foundation
	import Testing

	func waitForExpectation(
	timeout: Duration,
	description: String,
	fileID: String = #fileID,
	filePath: String = #filePath,
	line: Int = #line,
	column: Int = #column,

	//
	// Perlin noise text displacement.
	// Created using Processing 3.5.3.
	//
	// Code by @marcedwards from @bjango.
	//

	PGraphics textbuffer;

	void setup() {

	import Foundation

	@dynamicMemberLookup
	enum JSON: Codable, CustomStringConvertible {
	var description: String {
	switch self {
	case .string(let string): return "\"\(string)\""
	case .number(let double):
	if let int = Int(exactly: double) {
	return "\(int)"

	# 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)

	// @discardableResult to be added
	// @noescape needs to move to type annotation
	// needs to add _ for item
	public func with<T>(item: T, @noescape update: (inout T) throws -> Void) rethrows -> T {
	var this = item; try update(&this); return this
	}

	//
	// RxAlamofireObjMapper.swift
	// RXDemo
	//
	// Created by Yaqing Wang on 10/30/15.
	// Copyright © 2015 billwang1990.github.io. All rights reserved.
	//

	import Foundation
	import Alamofire