Put HHY to work.

Start with installation and your first script. Build up to file processing, data transformation, HTTP automation, and a JSON API. Every lesson includes English narration, captions, and runnable examples.

16 main lessonsEnglish audio & captionsHHY 1.7.078 minutes

Start the first lesson

01–05 · Language foundations

Install HHY and Run Your First Script

Install the command, verify your environment, and run a saved HHY script.

4:43No HHY experience needed

Values, Bindings, and Collections

Build a user record, update a counter, and distinguish reusable collections from ranges.

4:53Recommended before this: 01

Functions and Control Flow

Classify scores, total passing results, and use bounded repetition.

4:48Recommended before this: 02

Understand the Pipe Operator

Compare ordinary calls and pipelines while cleaning a short piece of text.

4:56Recommended before this: 03

Work with Lazy Streams

Filter records, transform selected values, limit work, and consume a stream deliberately.

4:50Recommended before this: 04

06–10 · Files, data, and system tasks

Read and Write Files

Read a directory of text files and save an uppercase copy.

4:44Recommended before this: 05

Clean Text and Match Patterns

Trim text and keep anchored WARN or ERROR records.

4:44Recommended before this: 06

Transform JSON and CSV

Filter CSV rows and explicitly convert JSON field types.

4:55Recommended before this: 07

Organize Scripts and Handle Errors

Split scripts into modules and handle recoverable and fatal errors.

4:55Recommended before this: 08

Automate Commands and System Tasks

Run commands, process standard input, and check exit codes.

5:07Recommended before this: 09

11–16 · Automation and practical projects

Call HTTP APIs

Fetch and filter JSON from a local API with explicit request policies.

4:48Recommended before this: 10

Add Bounded Parallelism

Check several local endpoints with two workers and keep failures in the report.

4:53Recommended before this: 11

Watch Files and Schedule Work

Trigger a local build from one file event and stop a timer after three ticks.

4:51Recommended before this: 12

Project: Build a Log Alert Report

Scan two log files, select warning and error lines, and save a deterministic report.

4:51Recommended before this: 13

Project: Build a CSV Report

Validate salary values and summarize active employees by department.

5:00Recommended before this: 14

Build Your First JSON API

Serve a local /hello route and read a query parameter using the built-in Web Runtime.

4:42Recommended before this: 15