purepath

What do you want to code?

Try,,,

purepath works out which skills that takes, teaches them in short sessions and checks the code and explanations you write. A skill is marked confirmed once you have solved three different kinds of task on your own.

7 days free, no cardthen $12 a month

  • JSON objects is confirmed by three answers from three kinds of task, none with help.
  • HTTP methods has two answers, and one used a hint, so it needs one more on your own.
  • net/http handlers opens once the topics before it are confirmed.

How your path is made

You say what you want to build and what you already know. purepath picks the topics and their order, sets aside what you know, then writes the first lessons and tasks. Each task is checked before it reaches you.

a REST API in GoYour goal
  1. HTTP methods and status codesYou know this, so it is set aside
  2. net/http handlers
  3. Routes and path parameters
  4. JSON requests and responses
  5. Storing data in PostgreSQL
  6. A task list APIYour project at the end

net/http handlers

Lesson

A handler is a function that reads a request and writes a response. net/http calls it for every request that matches its route.

  • UnderstandingWhich argument does a handler use to write the response?Solved in a separate run that never saw the answer
  • ExplanationExplain why two requests can run the same handler at once.Its criteria were tried on good and weak answers
  • ApplicationWrite a handler that answers every request with the text pong.Its reference solution passed its tests

An example. Your path comes from your own goal and what you know.

How a skill gets confirmed

Reading a lesson or asking the tutor moves nothing. The answers you write do. Code runs in the browser in Python, JavaScript, TypeScript, Go, Rust, Java, Kotlin, C#, PHP or Ruby.

You answer

Task 3 of 3 · Application

Write a JSON object for a book: its title, the year it came out and a list of its authors.

answer.json

It gets checked

Waiting for your answer

Your answer meets the requirements.

  • The title and each author are strings in double quotes
  • The year is a number, not a string
  • Authors is an array, even with a single author

Code is run against tests, and an explanation is judged on its meaning by an AI evaluator.

Your path moves

  • JSON objects2 of 3 independent answersDeveloping
  • HTTP methods2 of 3 · one used a hintDeveloping
  • HTTP status codesNo answers yetNot started

Up next

JSON objects

Finish this task to confirm the skill.

A task from the hand-written JSON and HTTP foundation.

Three answers behind every confirmed skill

Open any skill and you see them, with the date and how each was checked. A hint or the tutor's help on one of them would have left the skill in progress.

  1. JSON objectsConfirmed
  2. UnderstandingPicked the one valid JSON object out of three.On your own · Basic
  3. ExplanationExplained in your own words why 3 and “3” are different values.On your own · judged on meaning
  4. ApplicationWrote a book with its title, year and authors as a JSON object.On your own · checked against the task

7 days free, then one simple plan

Every new account gets 7 days with everything included, no card needed. Then keep learning for $12 a month or $96 a year. Sessions, project checks and tutor answers are never counted one by one.

Monthly

$12/month

YearlySave 33%

$96/year

Learning sessions and their checks
Included
Tutor answers, path planning
Included
Your path, progress, knowledge map
Included

Prices are before tax. Cancel any time; your progress stays yours.

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Questions people ask first

Do I need a subscription?
Not to start. Every account gets 7 days free with everything included, and no card is needed. To keep learning after that, subscribe for $12 a month or $96 a year and cancel any time. Your progress stays saved either way.
Where do I start?
Type what you want to build at the top of this page, or create an account and do it there. You choose frontend or backend, and your path starts with the first skill that goal needs.
How is knowledge confirmed?
Independent results provide evidence for a skill. A skill is confirmed after successful answers from different kinds of tasks, including an explanation and a solution of your own. Reading a lesson, asking the tutor or saying you know it does not confirm it.
I already know some of this. Do I start from zero?
No. Tell it what you already know when you set your goal. Those skills are marked as likely known, and your own answers confirm them.
Can I learn at my own pace?
Yes. Your goal and progress are saved to your account, so you can return to your path and continue when you are ready.
Which languages can I use?
Purepath speaks English, Arabic, Turkish, French, German, Portuguese and Spanish: the interface, lessons, tasks and feedback are in your language, and the tutor answers in the language you write in. Code stays as written.