Daniel Balcarek

ASP.NET

• Clean Unit Testing in .NET: Practical xUnit and Moq Tips

  Practical xUnit and Moq tips for cleaner, maintainable .NET unit tests.

• C# Minimal API: Multiple Authentication Schemes with Swagger Support

  How to configure multiple authentication schemes (JWT, Basic) in a Minimal API with Swagger support.

• C# Minimal API: A Practical Way to Keep Endpoints Clean

  How to keep your Minimal API endpoints clean and maintainable by using extensions.

• Response Caching

  Client-side caching headers in ASP.NET Core Minimal APIs.

• Output Caching

  Output caching in ASP.NET, Custom Output Caching Policy for authorization header, Minimal API

• ASP.NET Caching Strategies

  Overview of different caching strategies in ASP.NET.

• Secure ASP.NET Server Headers

  Configuring security headers in ASP.NET applications.

• Minimal API Pros & Cons

  Pros and cons of ASP.NET Core Minimal APIs.

• Configure Options Programmatically

  Configuring options programmatically in ASP.NET Core.

• Response vs Output Caching

  Comparison: Response Caching vs. Output Caching.

C#

• Remove Diacritics

  Extension method to remove diacritics using ISO-8859-8.

• Czech encoding in .NET

  How to add czech encoding into .NET project.

• Enumerable.ZIP

  Combine two sequences element by element.

• FluentResult UnwrapOrDefault

  Extension method for the `Result` object of FluentResult lib.

• LINQ: Chaining Two OrderBy Calls

  LINQ: Why Chaining Two OrderBy Calls Doesn’t Work the Way You Expect.

Benchmarks

.NET

• Exception vs Result pattern

  Benchmark about two error handling approaches.

• CopyTo vs Write

  Benchmark about using inner MemoryStream for copy byte array to output MemoryStream.

REFLECTION

• Get Enum Value Attribute

  Performance comparison of reflection, cached reflection, and FrozenDictionary for retrieving custom attributes from enum values in .NET 10.

• Export data

  Benchmarking reflection-based, cached reflection, and dictionary-based approaches for CSV data export in .NET 10.

• Create Instance

  Performance comparison of ServiceProvider, Activator.CreateInstance with concrete type, and Activator.CreateInstance via interface for creating class instances in .NET.

Architecture

• Clean vs Vertical Slice Architectures

  Comparsion of CA and VSA by real pull requests. Idea of Hybrid approaches.

• Clean Architectures pros and cons

  Clean Architectures pros and cons.

• REST

  • Problem Details

    Problem details standart and cheat sheet.

  • Rest API routes naming

    Rest API routes naming best practices.

Git

• Commit to master

  How to revert commit to master.

• SourceTree Troubleshooting Guide

  Fixes for startup crashes, rebase failures, and password resets.

• Cleaning in Git

  How to delete branches, stashes etc..

Configuration

• Visible internals from different project

  See internal classes from another C# project.

• Package json Versioning - Caret

  Caret Ranges cheat sheet.

• Node.js Version & Dependency Management

  Practical guide to switching Node versions with nvm, reinstalling dependencies and configuring npm registries.

• K8s, Istio, Argo cheat sheet

  Kubernetes, Istio, Argo cheat sheet.

Angular

• HTTP Caching with shareReplay

  Efficient HTTP caching with RxJS shareReplay.

• Overusing ChangeDetectorRef

  Avoid manual change detection anti-patterns.

• i18n multiple translation files

  Loading multiple translation files in ngx-translate.

• Redefine property of mock object

  Redefining mock properties with defineProperty.

• Run test commands

  Cheatsheet for running specific Angular tests.

• i18n parameters

  Passing parameters to translations in Angular.

• package-lock.json in Git

  Best practices for package-lock.json and npm ci.

JavaScript

• Json.stringify replacer

  Replace or Format data using JSON.stringify.

TypeScript

• TypeScript type utilities

  Lesser-known but highly useful TypeScript type utilities.

• TypeScript declare tips

  Node.JS Custom env variables, Declare types from different module ...

SQL

• Postgresql array

  Postgresql array tips.

• Composite Index and Separate Indexes

  Postgresql composite index and separate indexes.

• Bulk insert optimalization

  Postgresql Bulk insert optimalization tip.

• Database Optimization and Cleanup

  PostgreSQL Database Optimization and Cleanup.

AI

• General “Prompt Structure”

  General “Prompt Structure” for Clear Results.

• Copilot in IDE

  Tips and Tricks for Copilot in VS Code and VS.

• The Reality of VibeCoding - Task Manager & Sticky Notes Dashboard

  An honest breakdown of why vibecoding is fast but unreliable — and why AI still can't replace real engineering judgment.