Stephan van Stekelenburg Stephanvs

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

Install Arch Linux in VirtualBox

Quick install guide for Arch -- if you're looking for an automated installer, consider Arch Anywhere.

Download

Download the latest version from: https://www.archlinux.org/download/

A state machine is defined as follows:

Input - a set of inputs
Output - a set of outputs
State - a set of states
S0 ∈ S - an initial state
T : Input * State -> Output * State - a transition function

If you model your services (aggregates, projections, process managers, sagas, whatever) as state machines, one issue to address is management of State. There must be a mechanism to provide State to the state machine, and to persist resulting State for subsequent retrieval. One way to address this is by storing State is a key-value store. Another way is to use a SQL database. Yet another way is event sourcing. The benefit of even sourcing is that you never need to store State itself. Instead, you rely on the Output of a service to reconstitute state. In order to do that, the state machine transition function needs to be factored into two functions as follows:

	**/

	const int c = 261;
	const int d = 294;
	const int e = 329;
	const int f = 349;
	const int g = 391;
	const int gS = 415;
	const int a = 440;
	const int aS = 455;

	public interface IPublisherEvents
	{
	void OnPublished(object value);
	}

	public interface IPublisher : IActor, IActorEventPublisher<IPublisherEvents>
	{
	Task PublishAsync(object value);
	}

	/*
	* Copyright (C) 2014 Chris Banes
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software

	<?xml version="1.0" encoding="utf-8"?>
	<LinearLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:app="http://schemas.android.com/apk/res-auto"
	android:orientation="vertical"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<dk.ostebaronen.droid.viewpagerindicator.TitlePageIndicator
	android:id="@+id/viewPagerIndicator"
	android:padding="10dip"

	<?xml version="1.0" encoding="utf-8"?>
	<LinearLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:app="http://schemas.android.com/apk/res-auto"
	android:orientation="vertical"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<dk.ostebaronen.droid.viewpagerindicator.TitlePageIndicator
	android:id="@+id/viewPagerIndicator"
	android:padding="10dip"

	<Grid x:Name="LayoutRoot" Width="37" Height="42" Visibility="Collapsed" Opacity="0">
	<VisualStateManager.VisualStateGroups>
	<VisualStateGroup>
	<VisualState x:Name="DefaultState">
	<Storyboard>
	<ObjectAnimationUsingKeyFrames Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Visibility"
	BeginTime="0:0:0.2">
	<DiscreteObjectKeyFrame KeyTime="0:0:0" Value="Collapsed"/>
	</ObjectAnimationUsingKeyFrames>
	<DoubleAnimation Storyboard.TargetName="LayoutRoot" Storyboard.TargetProperty="Opacity"

	namespace BenjiiMe.Animation
	{
	public class ContinuumTransition : TransitionElement
	{
	public const string ContinuumElementPropertyName = "ContinuumElement";
	public const string ContinuumModePropertyName = "Mode";

	public FrameworkElement ContinuumElement
	{
	get { return (FrameworkElement)GetValue(ContinuumElementProperty); }