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並前往https://programming-idioms.org/idiom/11/pick-a-random-element-from-a-list/2330/rust

Pick a random element from a list, in Rust - Programming Idioms

List x must be non-empty. ... use rand::seq::SliceRandom;. let mut rng = rand::thread_rng(); let choice = x.choose(&mut rng).unwrap(); ...

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