Ace the Rust Interview

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The curriculum, drills, tutor, and interviewer mode are for readers of Ace the Rust Interview. The code is printed in the Preface (Companion site access).

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intermediate · order 57

When dyn Trait is the right call

trait-dyn-01Related book chapters: 10 (optional — this page is complete on its own)dynvtable

Slug: trait-dyn-01 · Paired reading: Chapter 10

Prompt

Define trait Describe { fn describe(&self) -> String; } and implement it for i32 and String. Implement fn describe_all(items: &[Box<dyn Describe>]) -> Vec<String>.