David Dancy programmation

programmation / task_dependency_manager

Created June 22, 2015 02:20

Task dependency manager from Stephen Toub MSDN article. Similar to NSOperationQueue / NSOperation on MacOS / iOS.

	// https://msdn.microsoft.com/en-us/magazine/dd569760.aspx

	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Text;
	using System.Threading;
	using System.Threading.Tasks;

	namespace OperationQueueTest

programmation / threadsafe_imagesource

Created June 22, 2015 00:33

How to make sure only one ImageSource load is in flight at a time

	// https://bugzilla.xamarin.com/show_bug.cgi?id=21981#c5

	using Xamarin.Forms;

	[assembly: ExportImageSourceHandler(typeof(UriImageSource), typeof(iOS.Renderers.ImageLoaderSourceHandler))]

	namespace iOS.Renderers
	{
	using System.Collections.Generic;
	using System.Threading;

programmation / delayed_text_entry

Created June 21, 2015 23:20

How to delay response to user text entry until after user finishes typing

	// http://forums.xamarin.com/discussion/comment/133731/#Comment_133731

	public partial class Page1
	{
	public Page1()
	{
	this.InitializeComponent();
	this.Entry.TextChanged += this.EntryOnTextChanged;
	}
	//

programmation / reversewords.cs

Last active August 29, 2015 14:20

	// https://msdn.microsoft.com/en-us/library/hh228604(v=vs.110).aspx

	using System;
	using System.Collections.Concurrent;
	using System.Collections.Generic;
	using System.IO;
	using System.Linq;
	using System.Net.Http;
	using System.Text;
	using System.Threading.Tasks;

programmation / async_factory.cs

Created May 4, 2015 07:04

Async factory method

	// http://blog.stephencleary.com/2013/01/async-oop-2-constructors.html

	public sealed class MyClass
	{
	private MyData asyncData;
	private MyClass() { ... }

	private async Task<MyClass> InitializeAsync()
	{
	asyncData = await GetDataAsync();

programmation / async_noop.cs

Last active August 29, 2015 14:20

Async no-op

	// http://blog.stephencleary.com/2015/04/a-tour-of-task-part-10-promise-tasks.html

	interface IPlugin
	{
	// Permit each plugin to initialize asynchronously.
	Task InitializeAsync();
	}

	class MyPlugin : IPlugin
	{

programmation / pcl_nugets.txt

Last active November 6, 2015 00:16

PCL NuGet packages

	// List of interesting NuGet PCLs

	Conditions
	ExifLib
	SharpSerializer
	PCLStorage
	BouncyCastlePCL (encryption)
	Sockets
	MathNet.Numerics
	Zeroconf (Bonjour)

programmation / gist:44edf45980b10276b14f

Created May 4, 2015 04:29

Xamarin Forms DataTemplateSelector

	using System;
	using Xamarin.Forms;
	using Xamarin.Forms.Xaml;

	namespace Test
	{
	public class DataTemplateSelectorExtension : IMarkupExtension
	{
	public Page Page { get; set; }

programmation / optional_interface.cs

Created May 4, 2015 04:26

Protocol pattern in C#

	// http://www.knowing.net/index.php/2014/07/10/

	interface IFoo
	{
	//Methods defined here, as always, must be implemented
	void Necessary ();
	}

	static class IFoo_Extensions
	{

programmation / unmanaged_resource_holder.cs

Created May 4, 2015 04:23

Unmanaged resource holder template

	// http://blog.adamkemp.com/2014/10/c-finalizers-and-idisposable.html

	public class UnmanagedResourceHolder : IDisposable
	{
	private bool _disposed;
	private OtherDisposableObject _otherDisposable;

	public UnmanagedResourceHolder()
	{
	AcquireUnmanagedResource();