Collections & iteration

Practical data work in Rust. Vectors, hash maps, arrays, tuples, iterator adapters, closures, and the ownership rules that appear when collections hold or yield values.

Themes

4.1

Vectors

Vec<T> is Rust's growable array. This theme teaches vec![], push, indexing, .get, ownership of elements, and passing vectors by value or slice. Planned exercises: 1. choose…

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4.2

Hash maps

HashMap<K, V> replaces many TypeScript object-as-map patterns, but lookups return Option<&V> and insertion may move keys and values. Planned exercises: 1. choose HashMap. 2.…

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4.3

Iterators

Idiomatic Rust often transforms data with iterators instead of manual indexing. The key ownership distinction is .iter(), .iter_mut(), and .into_iter(). Planned exercises: 1.…

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4.4

Closures

Rust closures look like compact TypeScript arrow functions, but they capture by borrow, mutable borrow, or move depending on use. Planned exercises: 1. choose closure syntax. 2. re…

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