Simple

Your First Query

Writing and executing your first LINQ query against EF Core, including deferred execution, projections, async queries, and the N+1 pitfall.

Working with Local Data

Learn how .NET MAUI apps persist data locally using Preferences for simple settings, SQLite for structured storage, and FileSystem APIs for documents and cache…

Building a Simple Token Contract

A hands-on walkthrough of writing an ERC-20 token in Solidity, from the standard's required interface to a minimal from-scratch implementation and the safer Op…

Your First Smart Contract

Write, compile, and deploy a complete storage contract, learning about the constructor, functions, events, access control, and the payable keyword along the wa…

Building a Simple CRUD App in VB.NET

A step-by-step walkthrough of building a Create-Read-Update-Delete application in VB.NET using ADO.NET and a repository pattern.

Building a Simple GUI App in Tk

A hands-on walkthrough of the widget-creation, layout, and event-handling steps needed to build a working Tk desktop app.

Building a Simple Calculator in LISP

A hands-on walkthrough of building a working arithmetic expression calculator in Common Lisp, from tokenizing input to evaluating nested expressions.

Building a Simple iOS App in Objective-C

A hands-on walkthrough of scaffolding, wiring, and running a basic iOS app entirely in Objective-C, from project setup to a working table view.

Building a Simple State Machine in Lua

A hands-on walkthrough of implementing a finite state machine in Lua using tables and functions, with a traffic-light example.

Building a Simple Wasm App

A hands-on walkthrough of building, compiling, and running a small WebAssembly module in both the browser and a standalone WASI runtime.

What Are Microservices?

An introduction to microservices architecture: small, independently deployable services that communicate over the network to form a larger application.

TDD for a Simple Feature

Walk through a complete red-green-refactor cycle for a realistic feature, from the first failing test to a clean, general implementation.

Deploying a Simple App on GCP

A hands-on walkthrough of deploying a simple containerized web app to Cloud Run, covering build, deploy, environment configuration, and rollback.

Deploying a Simple App on Azure

A hands-on walkthrough of deploying a simple web application to Azure App Service, from CLI deployment to CI/CD and configuration.

Deploying a Simple App on AWS

A practical walkthrough of the main paths for getting a small web application live on AWS, from Elastic Beanstalk to static hosting with S3 and CloudFront.

$lookup and Joins in MongoDB

Understand how $lookup performs left outer joins across collections in the aggregation pipeline, from simple equality joins to correlated subqueries.