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wrobstory/traverse.rs

Last active April 26, 2020 21:16
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Rust Traverse
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traverse.rs
fn into_result(input: &i32) -> Result<&i32, String> {
Ok(input)
}
fn main() {
let numbers: Vec<i32> = vec![1, 2, 3, 4, 5];
let mapper = numbers.iter().map(|x| into_result(x));
let vector_of_results = mapper.collect::<Vec<Result<&i32, String>>>();
println!("{:?}", vector_of_results);
// [Ok(1), Ok(2), Ok(3), Ok(4), Ok(5)]
let mapper = numbers.iter().map(|x| into_result(x));
let traversed = mapper.collect::<Result<Vec<&i32>, String>>();
println!("{:?}", traversed);
// Ok([1, 2, 3, 4, 5])
}
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