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 90

When bytes are enough

str-bytes-01Related book chapters: 14, 16 (optional — this page is complete on its own)bytesASCII

Slug: str-bytes-01 · Paired reading: Chapters 14 and 16

Prompt

fn ascii_digits(s: &str) -> Vec<u8> — collect ASCII digit bytes via s.bytes() and is_ascii_digit. When the problem is ASCII, bytes beat chars.