Joao Carlos Clementoni joaofx

Creating Neat .NET Core Command Line Apps

You can now read this on my (pretty) website! Check it out here.

Every reason to get more HackerPoints™ is a good one, so today we're going to write a neat command line app in .NET Core! The Common library has a really cool package Microsoft.Extensions.CommandlineUtils to help us parse command line arguments and structure our app, but sadly it's undocumented.

No more! In this guide, we'll explore the package and write a really neat

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  artifacts/
  build/
  docs/
  lib/
  packages/
  samples/
  src/
 tests/

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version

a simple git branching model (written in 2013)

This is a very simple git workflow. It (and variants) is in use by many people. I settled on it after using it very effectively at Athena. GitHub does something similar; Zach Holman mentioned it in this talk.

Update: Woah, thanks for all the attention. Didn't expect this simple rant to get popular.

	[Migration(1)]
	public class _201612091350_CreateAspNetIdentity : AutoReversingMigration
	{
	public override void Up()
	{
	Create.Table("AspNetRoles")
	.WithColumn("Id").AsString().PrimaryKey("PK_AspNetRoles").NotNullable()
	.WithColumn("ConcurrencyStamp").AsString().Nullable()
	.WithColumn("Name").AsString(256).NotNullable()
	.WithColumn("NormalizedName").AsString(256).Nullable()

	#r "./FAKE/tools/FakeLib.dll"
	#r "System.Xml"
	#load "initializeProperties.fsx"
	open InitializeProperties
	open Fake
	open System
	open System.IO
	open System.Configuration
	open System.Xml

	using System;
	using System.Collections.Generic;
	using System.Diagnostics;
	using System.Linq;
	using System.Reflection;

	using FubuCore.Util;


	namespace My.Core.Domain.Models {

	Set-WindowsExplorerOptions -EnableShowHiddenFilesFoldersDrives -EnableShowProtectedOSFiles -EnableShowFileExtensions -EnableShowFullPathInTitleBar
	Disable-UAC
	Enable-MicrosoftUpdate

	cinst VisualStudio2013Ultimate -InstallArguments "/Features:'Blend LightSwitch VC_MFC_Libraries OfficeDeveloperTools SQL WebTools Win8SDK SilverLight_Developer_Kit WindowsPhone80'"
	cinst VS2013.3

	cinst 7zip
	cinst autohotkey
	cinst ccleaner

         readonly ICollection<Action> _transactionCallbacks = new Collection<Action>();
         public override int SaveChanges() {
             int r;
             try {
                 ExecuteDomainEvents();
                 r = base.SaveChanges();
             } catch (Exception) {
                 _transactionCallbacks.Clear();
                 throw;

	# Create your superuser
	$ mongo
	> use admin
	> db.createUser({user:"someadmin",pwd:"secret", roles:[{role:"root",db:"admin"}]})
	> exit

	# Alias for convenience (optional and at your own risk)
	$ echo 'alias mongo="mongo --port 27017 -u someadmin -p secret --authenticationDatabase admin"' >> ~/.bash_profile
	$ source ~/.bash_profile