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Lessons (40)

• Transformers and Large Language Models

  … Given a context, it estimates a distribution over what token might come next, then generates a sequence one …

• SQL Language, Identifiers & Data Types

  Interview answers for DDL/DML/DCL, generated IDs, UNION, static/dynamic SQL and CHAR/VARCHAR. Covers PDF questions …

• What Is Artificial Intelligence? A Developer's Guide

  Understand AI, machine learning, deep learning, and generative AI through everyday examples and concrete software decisions. Start with …

• Advanced TypeScript for Frontend

  Model real UI states safely with generics, discriminated unions, conditional types and runtime schema validation at API boundaries …

• Imports, Moved Blocks, and Safe Refactoring

  … Provider docs define the import ID; different resource types use different formats. terraform plan -generate-config-out=generated …

• Developer Learning Plan and Document-Assistant Capstone

  … The first version should retrieve sources without generating answers. That baseline makes it easier to tell whether a …

• Count, for_each, Functions, and Stable Identities

  … 0 filename = "${path.module}/README-generated.txt" content = "Generated by Terraform.\n" } When present, the address is local …

• TypeScript Essentials

  … That's a whole class of UI bugs gone. Generics: types with parameters A generic is a type …

• Embeddings, Semantic Search, and RAG

  … 5. Generate: tell the model to answer from those passages and cite the supporting sources. 6. Evaluate: measure …

• AI Specialties and Real-World Examples

  Explore vision, language, speech, recommendations, anomaly detection, forecasting, reinforcement learning, and generative systems. Choose a branch by its …

• Atomic Design & Component Libraries

  … Styling can be shared; accessibility cannot be postponed. Keep domain logic out of generic components Atomic Design becomes …

• Variables, Locals, Outputs, and Validation

  … string description = "Lowercase project name used in the generated file." default = "academy" validation { condition = can(regex("^[a-z …

• Python Fundamentals

  … modern file paths Iterators and generators A generator produces values one at a time with yield , so it …

• TypeScript in Practice

  … asserts v is T { if (v === undefined) throw new Error( ${name} is required ); } Generics with constraints Generics are …

• AI Evaluation, Safety, and Security

  … Never treat generated content as executable or trusted by default. - Abuse and misuse: apply authentication, rate limits, content …

• S3: Store Files Safely

  … versions. A small CLI lab Create a private general-purpose bucket in a chosen Region through the S3 …

• SOLID at a Glance

  … js // ❌ Breaks almost every SOLID rule class Report { generate(data) { / build numbers / } toPdf() { / PDF logic / } toExcel() { / Excel logic …

• Domain-Driven Design: Strategic Design

  … invest in the core , keep supporting simple, buy generic . - Speak a ubiquitous language , in conversation and in code …

• Finding Service Boundaries with DDD

  … returns handling"] -- SupHow["Build simply,<br/ or outsource"] Generic["📦 Generic<br/ everyone needs it<br/ e.g. auth …

• Rust: Types, Errors and Concurrency

  … structs and enums with pattern matching, Option and Result with the ? operator, traits and generics, iterators and closures …

• Next.js Rendering: CSR, SSR, SSG, ISR & Server Components

  … Static Site Generation Pages are rendered once at build time into HTML files and served from a CDN …

• Design a URL Shortener

  … durable mappings, cache-backed redirects and asynchronous analytics](/img/system-design-l6/url-shortener.svg) Generate a Base62 …

• A WhatsApp OTP Is Only Single Use If You Make It So

  … The fewer live codes exist, the smaller the guessing surface. Generating and storing the code ts import { randomInt …

• What to Learn in AI, and in What Order

  … 5. Generative AI: Learn tokens, transformers, context windows, prompting, structured outputs, embeddings, retrieval-augmented generation (RAG), and tool …

• AWS Messaging: Queues, Topics and Events

  … For this lab, pretend you generated the receipt successfully, then delete using the current receipt handle: bash aws …

• Replication, Partitioning & Sharding

  … Plan the router, shard map, ID generation, backups, rebalancing and degraded behavior before splitting. Cross-shard joins and …

• Binary Search

  … 0 1 2 3 4 5 6 condition: ❌ ❌ ❌ ✅ ✅ ✅ ✅ ↑ find the first ✅ js // Generic: smallest x in [lo, hi …

• Go Fundamentals

  … HTTP frameworks recover from panics so one bad request doesn't kill the server. Generics go func Map …

• REST vs GraphQL vs gRPC

  … tools generate client and server code in Go, Java, Node.js, Python… js // Node.js client (generated stubs …

• CloudFront: Faster Websites and Safer File Delivery

  … Apply the generated bucket-policy permission for the particular distribution. 4. Set the default root object to index …

• Design a Reliable Notification System

  … A promotion generates one million messages while the email provider slows down. What must be true Protect urgent …

• Behavioral Patterns II: Chain, Template, Iterator, Mediator, Memento, Visitor

  … constructor(songs) { this.songs = songs; } [Symbol.iterator]() { // a generator makes iterators easy for (const song of this.songs …

• Dependencies, Data Sources, and Resource Lifecycle

  … Keep identity based on configuration, not an ID generated during apply. Replacement deserves attention A -/+ plan indicates destruction …

• Data Preparation and Model Training

  … and test when the real goal is to generalize to new people. - Computing a normalization average over all …

• Your Practical Kubernetes Workflow

  … template ./shop-api -f values-prod.yaml inspect generated YAML first helm rollback shop-api 1 -n production …

• Machine Learning Fundamentals

  … of missed fraud versus investigating a false alert. Generalization and overfitting A model should work on unseen examples …

• What Are Design Patterns?

  … cached). - Iterator → built in with Symbol.iterator and generators. This course shows the idiomatic JavaScript version of each …

• Extending Kubernetes: CRDs, Operators and Admission

  … policies written as YAML; can validate, mutate and generate resources. - OPA Gatekeeper : policies written in Rego. Webhook cautions …

• I — Interface Segregation Principle

  … OrderReader & OrderWriter) {} } Key takeaways - Many small, focused interfaces beat one large, general one. - If implementers throw "not supported …

• YAGNI: You Aren't Gonna Need It

  … feature with 3 users Clear names and structure Generic BaseAbstractManager<T classes Error handling and security Caching layer …