Rust

Iterator Chains in Rust

RustIteratorsChainingintermediate

Adapters build a pipeline description; nothing runs until a consumer such as collect drives it. The whole chain compiles to one loop.

expected output

[20, 40, 60]

Why practise typing this

Typing iterators code builds muscle memory for the symbols and indentation Rust uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

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