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it unlocks many cool features!
- fn main() {
- let bools = vec![false,true,true,false,false,true,false,false,true,true,false];
- let result: Vec<_> = bools.iter().scan(0, |n,b| {if *b { *n += 1;} Some(*n)}).collect();
- println!("{:?}", result);
- }
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