shiftkey

Reactive Extensions for Mere Mortals

The Reactive Extensions framework (Rx) is a collection of libraries to make it easy to work with asynchronous sources of data. But was it made just for academics and those who like to wear hypercolour shirts?

In this talk I'll run through:

• what IObservable and IObserver are and how they differ to IEnumerable
• how it differs from async/await - and where it's a better fit
• explain some of the common patterns that work well with Rx
• how desktop developers can use Rx (with ReactiveUI)

shiftkey

rm ~/.zsh_history
clear
touch ~/.zsh_history
tail -f ~/.zsh_history | sed -e 's/^:[[:space:]][0-9]*\:0;//g' -e '/tail*/d' -e '/clear/d'

shiftkey

Different license terms apply to different file types:

- Source code files are governed by the MICROSOFT PUBLIC LICENSE (Ms-PL) (INCLUDED BELOW).
- Binary files are governed by MSDN CODE GALLERY BINARY LICENSE (INCLUDED BELOW). 
- Documentation files are governed by CREATIVE COMMONS ATTRIBUTION 3.0 LICENSE (INCLUDED BELOW).
 

MICROSOFT PUBLIC LICENSE (Ms-PL)

This license governs use of the accompanying software. If you use the software, you accept this license. If you do not accept the license, do not use the software.

shiftkey

Library Project

• <Project ToolsVersion="12.0" - was 4.0
• <ProjectGuid>{DF7DEFA5-13DE-4B22-9D77-8817EB6C153A}</ProjectGuid> - was <ProjectGuid>{166FB620-192D-46A9-9F8D-5536C678AED0}</ProjectGuid>
• New parameter: <TargetPlatformVersion>8.1</TargetPlatformVersion>
• New parameter: <MinimumVisualStudioVersion>12</MinimumVisualStudioVersion>
• <VisualStudioVersion>12.0</VisualStudioVersion> - was 11.0

shiftkey

<VSTemplate Version="3.0.0" xmlns="http://schemas.microsoft.com/developer/vstemplate/2005" Type="Project">
  <TemplateData>
    <Name Package="{39c9c826-8ef8-4079-8c95-428f5b1c323f}" ID="3008" />
    <Description Package="{39c9c826-8ef8-4079-8c95-428f5b1c323f}" ID="3383"/>
    <Icon Package="{39c9c826-8ef8-4079-8c95-428f5b1c323f}" ID="4701"/>
    <TemplateID>Microsoft.Web.CSharp.WebApplication45</TemplateID>
    <ProjectType>Web</ProjectType>
    <ProjectSubType>CSharp</ProjectSubType>
    <SortOrder>10</SortOrder>
    <RequiredFrameworkVersion>4.5</RequiredFrameworkVersion>

shiftkey

public static void Main() {
	
	var found = elements.Where(e => e == "foo");
	// could be described as:
	// - found is elements where e equals foo
	// - found equals elements where e equals foo
	
	var match = elements.FirstOrDefault(e => e > 0);
	// could be described as:
	// - match equals elements first or default where e is greater than 0

shiftkey

var proxy = new WebProxy {Address = new Uri("http://someurl/")};
var handler = new WebRequestHandler {Proxy = proxy};
var client = new HttpClient(handler);
client.SendAsync(new HttpRequestMessage(HttpMethod.Get, "http://otherurl/"));

shiftkey

using System;
using System.Text.RegularExpressions;

namespace RegexTester
{
    class Program
    {
        private static void Main(string[] args)
        {
            var allText = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\r\n<doc>\r\n<!-- code start foo csharp -->\r\n<foo />\r\n<bar />\r\n<!-- end code foo -->\r\n<baz />\r\n</doc>";

shiftkey

D:\Code\github\scriptcs\scriptcs-samples\nancy [master +1 ~0 -0 !]> scriptcs sta
rt.csx
Found assembly reference: D:\Code\github\scriptcs\scriptcs-samples\nancy\package
s\Nancy.0.16.1\lib\net40\Nancy.dll
Found assembly reference: D:\Code\github\scriptcs\scriptcs-samples\nancy\package
s\Nancy.Hosting.Self.0.16.1\lib\net40\Nancy.Hosting.Self.dll
Found assembly reference: D:\Code\github\scriptcs\scriptcs-samples\nancy\package
s\Nancy.Bootstrappers.Autofac.0.16.1\lib\net40\Nancy.Bootstrappers.Autofac.dll
Found assembly reference: D:\Code\github\scriptcs\scriptcs-samples\nancy\package
s\Autofac.2.6.3.862\lib\NET40\Autofac.Configuration.dll

shiftkey

Burn Sandcastle to the Ground

Addressing The Documentation Problem

I've had lots of discussions with people over the past few days around how open source projects in the .NET space have poor documentation (if it exists). So how do we fix this?

At a high-level, I've got these goals in mind:

• make it easy
• make it cool