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Babel Shelf Wiki

A CRUD bookshelf app built in every language. Same API, same database, different implementations.

This wiki is a learning companion — each page breaks down how a language solves the same problem, with Python translations to build intuition.

Language Guides

• Go Bookshelf — Structs, pointers, if err != nil, stdlib HTTP
• TypeScript Bookshelf — Interfaces, async/await, Hono, Bun runtime
• Gleam Bookshelf — Custom types, Result, pattern matching, BEAM
• Gleam pog — Query pipelines, typed parameters, row decoders

Cross-Cutting Topics

• Babel Rosetta — Side-by-side comparison of the same logic in every language
• SQL Layer Across Languages — How each language talks to the same Postgres database
• Error Philosophy — Go's explicit errors vs TS exceptions vs Gleam's Result type
• Testing Patterns — Same 8 tests, 3 very different approaches