bdaniel7

Using a rotary encoder as a volume control

On my RetroPie machine I wanted a hardware volume knob — the games I play use a handful of emulators, and there's no unified software interface for controlling the volume. The speakers I got for my cabinet are great, but don't have their own hardware volume knob. So with a bunch of googling and trial and error, I figured out what I need to pull this off: a rotary encoder and a daemon that listens for the signals it sends.

Rotary encoder

A rotary encoder is like the standard potentiometer (i.e., analog volume knob) we all know, except (a) you can keep turning it in either direction for as long as you want, and thus (b) it talks to the RPi differently than a potentiometer would.

I picked up this one from Adafruit, but there are plenty others available. This rotary encoder also lets you push the knob in and treats that like a button press, so I figured that would be useful for toggling mute on and off.

bdaniel7

module StateMachine =
    type State<'Event> =
        | Next of ('Event -> State<'Event>)
        | Stop

    let feed state event =
        match state with
        | Stop -> failwith "Terminal state reached"
        | Next handler -> event |> handler

bdaniel7

internal class DockerMsSqlServerDatabase : IAsyncDisposable
{
    private const string Password = "!Passw0rd";
    private const string Image = "mcr.microsoft.com/mssql/server";
    private const string Tag = "2019-GA-ubuntu-16.04";

    private static IContainer _sqlServerContainer;
    private SemaphoreSlim semaphore = new(1, 1);
    private readonly string DatabaseName;

bdaniel7

; Full script for making an NSIS installation package for .NET programs,
; Allows installing and uninstalling programs on Windows environment, and unlike the package system 
; integrated with Visual Studio, this one does not suck.

;To use this script:
;  1. Download NSIS (http://nsis.sourceforge.net/Download) and install
;  2. Save this script to your project and edit it to include files you want - and display text you want
;  3. Add something like the following into your post-build script (maybe only for Release configuration)
;        "$(DevEnvDir)..\..\..\NSIS\makensis.exe" "$(ProjectDir)Setup\setup.nsi"
;  4. Build your project. 

bdaniel7

let query = "daniel";

let filter = {
  logic: "or",
  filters:[
    { field: "FirstName", operator: "contains", value: query },
    { field: "LastName", operator: "contains", value: query },
    { field: "Email", operator: "contains", value: query },
  ]
}

bdaniel7

Snippets for http://fagner.co/2016/01/02/Defining-cross-cutting-concerns-using-the-MediatR-library/

bdaniel7

public IServiceProvider ConfigureServices(IServiceCollection services)
{
  // domainAssembly contains all IRequest<>, IRequestHandler<>, INotification, INotificationHandler<> implementations
  var domainAssembly = typeof(RegulationEmailNotificationHandler).Assembly;

  services.AddMediatR(domainAssembly);
  
// ContainerBuilder is from Autofac
  var builder = new ContainerBuilder();
  

bdaniel7

param($installPath, $toolsPath, $package, $project)
$projectFullName = $project.FullName
Write-Host "Copying Docs folder to the root of the solution: $projectFullName"
 
$fileInfo = new-object -typename System.IO.FileInfo -ArgumentList $projectFullName
$projectDirectory = $fileInfo.DirectoryName

$sourceDirectory = "$installPath\docs"

Write-Host $sourceDirectory