# skyzh/type-exercise-in-rust

Learn advanced Rust techniques by building an expression evaluation framework for a database system.

Repository: https://github.com/skyzh/type-exercise-in-rust
Canonical: https://ross.abutalabs.com/products/type-exercise-in-rust
Homepage: https://skyzh.github.io/type-exercise-in-rust/
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: rust, database, type, tutorial
Last push: 2026-08-26T08:57:00+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 1686, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1501, forks 65 (observed 2026-08-28T04:04:54.342455+00:00)

## What it is
A Rust tutorial course that teaches advanced type-system techniques by building a typed, vectorized expression evaluation engine for a database system. It is structured as ordered chapters with exercises, starter code, and cumulative tests.

## Use cases
- learn advanced Rust type system techniques
- practice Rust generics and traits with exercises
- understand how database expression engines are implemented
- learn to build a vectorized expression evaluator in Rust
- find a hands-on Rust course with tests
- study type-driven design for columnar data

## When to choose
- you already know basic Rust (enums, traits, references, Option) and want to level up
- you learn best by implementing code against supplied tests
- you are interested in database internals or type-level programming

## When to avoid
- you are a complete Rust beginner
- you need a production-ready expression engine to use in a real system
- you need topics the course explicitly excludes, like Decimal arithmetic, casts, or aggregates

## Facets
- artifact type: learning-resource
- maturity: active
- function: developer-tools, interpreter, testing
- domain: programming-languages, databases, tutorials, education
- platform: rust, cli, cross-platform
- tags: rust-tutorial, type-system, expression-engine, database-internals, generics, course, exercises

## Member repositories
- skyzh/type-exercise-in-rust (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:54.342455+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:32:57.579179+00:00, confidence not recorded.
  - readme: https://github.com/skyzh/type-exercise-in-rust (fetched 2026-08-28T04:04:54.342455+00:00, sha 749c343ae31f)
  - homepage: https://skyzh.github.io/type-exercise-in-rust/ (fetched 2026-08-29T11:37:51.797359+00:00, sha ca41ba57caea)
- Data as of 2026-08-30T08:39:29.467469+00:00.