Code

XAML vs Code-Behind

How declarative XAML markup and imperative code-behind combine into one partial class, what belongs in each, and how MVVM shifts logic out of code-behind.

Code-First vs Database-First

Comparing the Code-First and Database-First workflows in EF Core and how to choose between them, including hybrid approaches.

Testing Async Code: Promises and async/await

Learn the correct patterns for testing promise-based and async/await code in Jest, and the pitfalls that let async bugs slip past a green test run.

Code Coverage with Jest

Understand how Jest measures code coverage across statements, branches, functions, and lines, and how to enforce thresholds in CI.

Platform-Specific Code

Learn how to branch behavior per platform in .NET MAUI using conditional compilation, partial classes, and platform folders.

Pascal Best Practices

Practical conventions for writing clean, maintainable, and bug-resistant Pascal code, from naming and scoping to structured control flow.

Procedures and Functions

Learn how Pascal separates reusable code into procedures (no return value) and functions (return a value), and how to declare and call each.

Authorization Code with PKCE

The Authorization Code grant is OAuth 2.0's most secure and widely used flow, and PKCE hardens it further so it is safe for public clients like single-page app…

The Authorization Code Flow

A step-by-step walkthrough of OAuth 2.0's most widely used grant type, the authorization code flow, including why PKCE is now required for public clients.

Apex Best Practices

The core disciplines — bulkification, selective SOQL, and layered architecture — that keep Apex code safe at production scale.

Testing Apex Code

Learn how to write robust Apex test classes, use assertions and mocks, and produce meaningful code coverage that survives real deployments.

Inheritance in Solidity

Inheritance lets contracts reuse and extend each other with the is keyword, virtual/override, super, C3-linearized multiple inheritance, and ordered constructo…

Securing and Protecting VBA Code

Understand how to protect VBA projects and workbook contents, the real limits of VBA password protection, macro security settings, and digital signing to keep…

Unit Testing VB.NET Code

How to write and run automated unit tests for VB.NET code using MSTest, NUnit, or xUnit, including mocking and test structure best practices.

VB.NET Best Practices

Practical conventions and patterns for writing clean, maintainable, and performant VB.NET code in real-world applications.

Namespaces in Tcl

How Tcl's namespace command organizes procedures and variables into separate scopes to avoid naming collisions in larger programs.

Code as Data: Homoiconicity

Why LISP source code and LISP data share the same list representation, and how this property enables macros, metaprogramming, and eval.

Unit Testing Objective-C Code

How XCTest structures test cases and assertions, how to isolate dependencies with mocks, and how to test asynchronous Objective-C code reliably.

Debugging and Profiling MATLAB Code

Practical techniques for finding correctness bugs with MATLAB's interactive debugger and finding performance bottlenecks with the Profiler.

Testing R Code with testthat

Learn how to write, organize, and run automated unit tests for R functions and packages using the testthat framework.

Writing R Packages

Learn how to structure, document, and build a distributable R package using usethis, roxygen2, and devtools.

Testing Julia Code

How to write unit tests for Julia code using the built-in Test standard library, organize test suites, and integrate testing into package development.

Testing D Code

D has unit testing built directly into the language with unittest blocks, plus contract programming (in/out/invariant) and assert for runtime correctness check…

Dart Best Practices

A working guide to idiomatic Dart: naming, null safety, collections, async patterns, and tooling that keeps a Dart codebase clean and fast.

Web Performance Optimization Cheat Sheet

Covers measuring Core Web Vitals, lazy loading and code splitting, caching headers and resource hints, and key optimization techniques.

OAuth & JWT Authentication Cheat Sheet

Explains OAuth 2.0 grant types, the Authorization Code plus PKCE flow, and JWT structure, claims, and verification for securing APIs.