thomaslevesque’s gists

thomaslevesque / Memoize.cs

Created August 14, 2012 00:41

IEnumerable<T> memoization (based on http://www.kodefuguru.com/post/2012/08/13/Caching-LINQ-Results.aspx)

	public static class Sequence
	{
	public static IEnumerable<T> Memoize<T>(this IEnumerable<T> sequence)
	{
	return new MemoizedSequence<T>(sequence);
	}
	}

	// This code is for illustration and is not production-ready.

thomaslevesque / ThemeInfo.cs

Created September 6, 2012 08:33

Get information about current Windows theme in C#

	public class ThemeInfo
	{
	private readonly string _themeName;
	private readonly string _themeColor;
	private readonly string _themeSize;
	private readonly string _themeFileName;

	public ThemeInfo(string name, string fileName, string color, string size)
	{
	_themeName = name;

thomaslevesque / ThreeZip.linq.cs

Last active December 16, 2015 00:29

	void Main()
	{
	var list1 = Enumerable.Range(0, 10000).Select(i => i.ToString());
	var list2 = Enumerable.Range(0, 10000).Select(i => i.ToString());
	var list3 = Enumerable.Range(0, 10000).Select(i => i.ToString());

	// First run to avoid JIT during the benchmark
	list1.ZipOne(list2, list3, Merge).Count();
	list1.ZipTwo(list2, list3, Merge).Count();

thomaslevesque / DelegateCommand.cs

Created April 17, 2013 23:14

Basic DelegateCommand implementation

	using System;
	using System.Windows.Input;

	namespace QuestionableContent.Input
	{
	public class DelegateCommand : ICommand
	{
	private readonly Action _execute;
	private readonly Func<bool> _canExecute;

thomaslevesque / Strings.tt

Last active February 5, 2021 15:06

Generates a strongly typed wrapper for a resource file, compatible with the Portable Class Library. Just drop this T4 template in your project, with the same base name as a .resx file in the same folder (e.g. Strings.tt for Strings.resx)

	<#@ template debug="false" hostspecific="true" language="C#" #>
	<#@ assembly name="System.Core" #>
	<#@ assembly name="System.Xml" #>
	<#@ assembly name="System.Xml.Linq" #>
	<#@ assembly name="EnvDTE" #>
	<#@ import namespace="System.IO" #>
	<#@ import namespace="System.Linq" #>
	<#@ import namespace="System.Text" #>
	<#@ import namespace="System.Globalization" #>
	<#@ import namespace="System.Collections.Generic" #>

thomaslevesque / DataProtectionExtensions.cs

Created May 26, 2013 14:40

Simple string encryption using Data Protection API in WinRT

	using System;
	using System.Threading.Tasks;
	using Windows.Security.Cryptography;
	using Windows.Security.Cryptography.DataProtection;

	namespace App1
	{
	public static class DataProtectionExtensions
	{
	public static async Task<string> ProtectAsync(this string clearText, string scope = "LOCAL=user")

thomaslevesque / AsyncDisposal.cs

Created July 5, 2013 18:40

Async disposal

	async void Main()
	{
	Console.WriteLine ("Before Using");
	await Async.Using(new Test(), t =>
	{
	Console.WriteLine ("In Using body");
	throw new Exception("Oops");
	});
	Console.WriteLine ("After Using");
	}

thomaslevesque / gist:6100447

Created July 28, 2013 22:05

Proof that enum types are mutable

	var field = typeof(DayOfWeek).GetField("value__");
	var d = DayOfWeek.Monday;
	Console.WriteLine (d);
	TypedReference r = __makeref(d);
	field.SetValueDirect(r, 4);
	Console.WriteLine (d);

thomaslevesque / Distinct2.cs

Last active December 20, 2015 09:19

Distinct overload with 2 type parameters, to solve the problem shown on Eric Lippert's blog (http://ericlippert.com/2013/07/29/a-contravariance-conundrum/)

	public static IEnumerable<T> Distinct<T, U>(this IEnumerable<T> source, IEqualityComparer<U> comparer)
	where T : U
	{
	IEqualityComparer<T> comparer2 = (IEqualityComparer<T>)comparer;
	return Enumerable.Distinct<T>(source, comparer2);
	}

thomaslevesque / AlternateDataStream.cs

Created August 12, 2013 13:00

Class that gives access to NTFS Alternate Data Streams

	using System;
	using System.IO;
	using System.Runtime.InteropServices;

	namespace ADS
	{
	public static class AlternateDataStream
	{
	public static FileStream Open(string path, string streamName, FileMode mode)
	{

Thomas Levesque thomaslevesque