MirzaLeka

Installation problem

Attempting to install a package on outdated Angular version (21)

> npm install ngx-markdown

Output:

npm ERR! code ERESOLVE

MirzaLeka

Error handling with Tuples

What is a Tuple?

A tuple is a type that allows for wrapping many different types, e.g,: (string, int, bool), without neededing to create a class.

Service contract

The method contract returns:

• bool - succesful status check
• integer - status code
• Blog - Entity

MirzaLeka

namespace ExceptionHandling.Error
{
 internal sealed record ErrorCore : IError
 {
  public string Title { get; }
  public string Message { get; }
  public int StatusCode { get; }
  public object? Payload { get; }

  private ErrorCore(string title, string message, int statusCode, object? payload)

MirzaLeka

Implement blogging:

	public class BlogService : IBlogService 
	{
		private readonly List<Blog> _repository = [];
	
	}

MirzaLeka

Get committed offets on Kafka consumer

The guide explains how to inspect consumer using Kafka CLI.

Find running Kafka container:

> docker ps | grep kafka

Enter your Kafka (docker) container:

MirzaLeka

Applying the Reply (Result) pattern into existing error-handling solution

The project uses the Error class to create new error response objects:

public class Error
{
		public int StatusCode { get; set; }
		public string Message { get; set; }

		public Error(int status, string msg)

MirzaLeka

IOptions in ASP .NET Core

Suppose you have some data in appsettings.json and you want to pull out the VapidConfig:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"

MirzaLeka

Add Or Update in C# Concurrent Dictionary

Suppose you've created a concurrent dictionary to store key-value pair data.

		private static readonly ConcurrentDictionary<string, PushSubscription> _subscriptions = new();

Then you create a method that inserts data into this dictionary:

MirzaLeka

namespace DotNet8Starter.DL.Models
{
	public class ExcelResponse
	{
		public string Name { get; set; }
		public byte[] Data { get; set; }

		public static ExcelResponse ToResponse(string name, byte[] data)
		{
			return new ExcelResponse()

MirzaLeka

Code analyzed by Claude. Output is a sequence diagram for Mermaid.js.

POST /api/games/NewGameMode — Create

sequenceDiagram
    participant Client
    participant GamesController
    participant GamesService
    participant GamesContext