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Applied Intermediate

12 Iterators

Iterator chains replace most hand-written loops. Build a value by chaining adaptors and finishing with a consumer like sum or collect.

Step 2 / 3

In long_word_lengths, collect the lengths of the words longer than 3 characters into a Vec.

Hints

12_iterators.rs

// lengths of the words with more than 3 chars, in order
fn long_word_lengths(words: &[&str]) -> Vec<usize> {
    todo!()
}

// lengths of the words with more than 3 chars, in order
fn long_word_lengths(words: &[&str]) -> Vec<usize> {
    todo!()
}

Reset to starterCompiled in a sandbox; hidden checks must pass.

Reveal solution

fn long_word_lengths(words: &[&str]) -> Vec<usize> {
    words.iter().filter(|w| w.len() > 3).map(|w| w.len()).collect()
}