Ch03 traits and generics#8
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Maps Python's try/except/None to Rust's Result<T,E>, Option<T>, and the ? operator. Covers custom error types, Option chaining, iterator collect into Result, and the LBYL/EAFP/types comparison. 16 passing example tests, 5 exercises with todo!() stubs. Also fixes ch01 Logger exercise: replaced todo!() in Drop impl with a comment-only stub to avoid double-panic abort in the test runner. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Maps Python's ABCs/Protocols/duck typing to Rust's trait system. Covers trait definition and implementation, generic functions with trait bounds, default methods, derived traits, operator overloading (Add, Sub, Display), static vs dynamic dispatch, and multiple trait bounds with where clauses. 16 passing example tests, 5 exercises with todo!() stubs covering HasArea trait, generic largest_area, Display for Temperature, Add for Money, and dynamic dispatch with Renderable. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Builds the concept of content-addressable data from first principles: BLAKE3 hashing, deterministic serialization with serde, a ContentAddressable trait with default methods, a content-addressed store with deduplication, verified retrieval, and composable Merkle-style content addressing. 17 passing example tests, 5 exercises building a mini CAS system from scratch (hash function, trait definition, Config implementation, content-addressed cache, and Merkle-chain snapshots). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…sable Add Chapter 4: Content-Addressable Data
…onflict) WHAT: merge origin/main (ch02 via PR #1 + CI exercise-gating via PR #7) into this branch; conflict was only in [workspace] members — kept the ch03/ch04 entries this branch adds. WHY: PR #8 was CONFLICTING; this makes it mergeable. Verified locally with CI-parity checks: tests (excl. exercise crates), clippy -D warnings, fmt --check — all green. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Summary
Test Plan
cargo test/just check)Safety Checklist