Ariel Weinberger

A plain way to walk through a small coding project in an interview: what you built, where you got stuck, and what you would change next.

Learn SQL GROUP BY with one small table: count and total rows per group, group by two columns, filter groups with HAVING, and fix the classic GROUP BY error.

A beginner Next.js tutorial: build a small coffee menu with the App Router. Create a page, a layout, a dynamic route, and fetch data on the server.

TypeScript generics let one function work with many types without losing type safety. Learn the T, inference, constraints, and Partial with examples.

AI writes more code than ever. These are the developer skills that still matter: reading code, debugging, breaking problems down, and design judgment.

Learn addEventListener step by step: handle clicks, typing and form submits, use the event object, and avoid the mistakes that break listeners.

TypeScript is JavaScript with types. See what it catches, what it costs, and a step-by-step path from JavaScript to TypeScript.

Destructuring unpacks objects and arrays into variables in one line. Learn renaming, defaults, nested values, function arguments and the undefined error.

The DOM is the browser's live version of your HTML. Learn how JavaScript finds elements, changes text and classes, reacts to clicks and builds new ones.

Python f-strings put values straight into text. Learn decimals, thousands separators, percentages, column alignment and the {value=} debug trick.

How the HTML anchor tag works: full URLs, relative paths, jump links to a section, opening a new tab safely, and the small mistakes that break links.

Number(), parseInt() and parseFloat() each handle text differently. See which to use, what they do with tricky input, and how to check the result.

A Python lambda is a small function written as one expression. See the syntax, how it powers sorted(), max() and min(), and when def is clearer.

A one-hour coding practice you can repeat on a weeknight: recall, one exercise you write, a short note, and a start line for tomorrow.

Python input() always returns a string. Learn to convert it, catch bad answers, ask again in a loop, and reuse that in a function.

Interactive platforms where you can write and run Python in the browser in 2026, with nothing to install, and who each one suits.

Codédex is a playful sampler of many languages. Start.dev goes deep on the whole web stack, with challenges, AI at every step and a study advisor.

A practical order for learning React: components, then props, then state. You will know what to practice first and what can wait.

See what changes after React: which file is a page, when a component needs the browser, and why a notes list can skip useEffect.

Turn a for loop that builds a new list into one line. You will curve scores, keep the ones that pass, and fix the syntax error beginners hit.

Intermediate Python and Building APIs with FastAPI are live. See who each course is for, and how Python for Beginners, SQL, and Git fit beside them.

A practical roadmap for getting your first developer job without a computer science degree: what to learn, what to build, and how to apply and interview.

Stuck watching tutorials but unable to build alone? Learn the four causes of tutorial hell, how start.dev solves each, and a weekly routine to break out.

Prepare for a junior React interview: the core concepts to explain, the coding tasks to practise, and short example answers for state, props, effects and lists.

Ten JavaScript interview questions junior developers get asked, with short answers, runnable examples, and the follow-ups interviewers like to ask next.

AI can speed up learning to code or quietly stop it. Learn how to use AI as a tutor, with example prompts and how Stuart on start.dev makes the help personal.

Boot.dev is a backend-focused learning platform. Start.dev teaches the whole stack, with challenges, AI at every step and a study advisor that knows where you're stuck.

Flexbox or CSS Grid? Learn the one-dimensional vs two-dimensional rule, see both build the same layout, and get a quick way to pick the right one.

What useEffect really does, when it runs, and how the dependency array and cleanup function work. Simple examples for fetching data, timers and page titles.

Learn how to center a div in CSS with Flexbox, Grid, margin auto, text-align, absolute positioning and Tailwind, and which method to pick for each situation.

Learn the JavaScript array methods you will use daily: map, filter, find, some, every, reduce and sort, with runnable examples on one shopping cart.

Learn what Express middleware is, how next() moves a request through the pipeline, and how to write a logger, an API-key gate and an error handler.

Build your first REST API with Node.js and Express in about 50 lines: routes, JSON, POST, PUT and DELETE, tested with curl, plus where to go next.

Learn how REST APIs work by following one request from client to server and back: URLs, methods, headers, status codes, JSON, and what REST actually means.

Python or JavaScript as your first language? See the same program written both ways, where each trips beginners up, and why JavaScript takes you furthest.

Learn the CSS box model with clear diagrams and code: content, padding, border, and margin, plus box-sizing, margin collapse, and DevTools tips.

Python lists, tuples and dictionaries compared with simple examples: how each one works, how they differ, and a quick rule for picking the right one.

useState or useReducer? See the same cart built both ways, the signs it's time to switch, and a simple rule of thumb for choosing in your React components.

Confused by SQL joins? Learn INNER, LEFT, RIGHT, FULL and CROSS joins with one tiny dataset, plain-English explanations and copy-paste queries.

Git has hundreds of commands, but you only need about ten. Learn the everyday Git commands for saving, reviewing, branching and sharing your work.

A plain-English guide to JavaScript async/await: what it really does, how it relates to promises, and the mistakes that trip people up.

A day-by-day Python roadmap for your first 30 days: what to learn, what to build each week, and the mistakes that stall most beginners.

Should beginners learn Tailwind or plain CSS first? See the same card built both ways, what Tailwind assumes you know, and a learning order that works.

A practical guide to the ten SQL queries that cover most of what beginners need: SELECT, WHERE, ORDER BY, GROUP BY, JOIN, and safe UPDATE and DELETE.

Start.dev and Scrimba both teach web development hands-on. Here is how they differ in format, practice, AI help, and pacing, and which one fits the way you learn.

You copied an array, changed the copy, and the original changed too. Here is what a JavaScript variable actually holds and how to copy safely.

You can read JavaScript but keep forgetting how to write it. The difference between an expression and a statement explains most of the syntax.

Coding interviews are not disappearing, but AI is changing their format. Here is what current hiring data says and how developers should prepare.

Improve your developer resume, portfolio, cover letter, and application with practical advice that avoids common ATS myths and risky absolutes.

Learning to code is still worth it for many people, but AI changed the work and raised the bar. Use this evidence and decision framework before you commit.

A practical plan for learning to code in 2026: choose one language, build fundamentals, use AI safely, and know when you are ready to advance.

AI made polished resumes and portfolio projects easier to produce. Learn how junior developers can replace weak signals with credible proof of skill.

The first-party story of Start.dev's June 2026 pre-launch: 1,000 signups in 48 hours, a fast-growing Discord, and the work behind launch week.