Leandro Fernandes leandromoh

💭

Talk is Cheap, Show me the code!

.NET developer and MCP in C#, with exceptional interesting about programming paradigms. Degree in System Analysis and Development

leandromoh / ReadOnlySpan<char> to Enum.cs

Last active December 19, 2021 04:57

Converts ReadOnlySpan<char> to Enum generating an expression tree #3

	using BenchmarkDotNet.Attributes;
	using BenchmarkDotNet.Running;
	using System;
	using System.Linq;
	using System.Linq.Expressions;


	// ``` ini
	//
	// BenchmarkDotNet=v0.13.1, OS=Windows 10.0.18363.1440 (1909/November2019Update/19H2)

leandromoh / snapshots.cs

Last active January 28, 2021 19:23

	static void Resultado()
	{
	var updates = new[]
	{
	new Data { Name = "A1", ReferenceDate = DateTime.Today },
	new Data { Name = "B1", ReferenceDate = DateTime.Today },
	new Data { Name = "C1", ReferenceDate = DateTime.Today },
	new Data { Name = "D1", ReferenceDate = DateTime.Today },

	new Data { Name = "A2", ReferenceDate = DateTime.Today.AddMinutes(10) },

leandromoh / mixin example.cs

Last active August 26, 2020 15:37

generate a type that inherit some type and implements a decorator pattern for interfaces

	using System;
	using System.Diagnostics;
	using System.Linq;
	using System.Reflection;
	using System.Reflection.Emit;

	namespace ConsoleApp3
	{
	static class Program
	{

leandromoh / NullPropagationVisitor.cs

Last active December 10, 2023 02:38

visitor that modify expression tree for safe null propagation! This code is now maintained in https://github.com/leandromoh/NullPropagationVisitor

	using System;
	using System.Diagnostics;
	using System.Linq.Expressions;

	namespace ConsoleApp3
	{
	static class Program
	{
	private static string Foo(string s) => s;

leandromoh / Anonymous type with Expression.cs

Created June 9, 2020 15:00

Anonymous extension method that allow create a new instance of anonymous with new values, similar to with expression of records in C# and F#

	public static class AnonymousExtension
	{
	static void Main(string[] args)
	{
	var person = new { FirstName = "Scott", LastName = "Hunter", Sex = 'M', Age = 25 };

	var otherPerson = person.With(new { LastName = "Hanselman" });

	Console.WriteLine(otherPerson);
	}

leandromoh / inner list bind.html

Created October 28, 2017 23:42

	<div id="Estados" class="timeline p-25">
	<div class="t-view m-0 m-t-20 Estados">

	<input type="hidden" name="Estados.index" autocomplete="off" value="30f0929e-f646-4f3c-a7a6-d432c1b0ce5a">
	<div class="tv-header media m-0 p-20">

	<ul class="actions">
	<li>
	<a href="#" onclick="return false;" class="deleteRow">
	<i class="zmdi zmdi-delete"></i>

leandromoh / MVC BIND LIST TUTORIAL.txt

Created October 28, 2017 23:31

	http://ivanz.com/2011/06/16/editing-variable-length-reorderable-collections-in-asp-net-mvc-part-1/
	https://mleeb.wordpress.com/2013/11/23/editing-nested-lists-in-asp-mvc-4/
	http://www.joe-stevens.com/2011/06/06/editing-and-binding-nested-lists-with-asp-net-mvc-2/

	http://www.devtrends.co.uk/blog/the-complete-guide-to-validation-in-asp.net-mvc-3-part-1
	http://nadeemkhedr.com/how-the-unobtrusive-jquery-validate-plugin-works-internally-in-asp-net-mvc/

leandromoh / ToSelectList.cs

Created October 28, 2017 23:28

	public static SelectList ToSelectList<T, A>(this IEnumerable<T> source, Func<T, A> valueSelector, Func<T, string> textSelector, A? selectdOption = null, string nullOption = "Todos")
	where T : class
	where A : struct
	{
	var descriptions = source.ToDictionary(valueSelector, textSelector);

	var ordered = descriptions.OrderBy(i => i.Value).Select(i => new KeyValuePair<A?, string>(i.Key, i.Value));
	var defaul = Enumerable.Repeat(new KeyValuePair<A?, string>(null, nullOption), 1);

	return new SelectList(defaul.Concat(ordered), "Key", "Value", selectdOption ?? defaul.First().Key);

leandromoh / features that C++ and C# have, but Java does not

Created October 25, 2017 02:05

	preprocessor directives
	goto
	operator overload
	pointer
	methods not virtual by default
	unsigned integer types
	user-defined casts
	output parameters
	destructor

leandromoh / morelinq contribuitions

Created October 25, 2017 02:01

	CountBy;
	AtLeast, AtMost, Exactly & CountBetween;
	Sequence
	Repeat
	SkipLast
	AggregateRight
	Unfold
	ScanRight
	PadLeft
	Move