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solve compile error

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This commit is contained in:
Lori-Shu 2025-05-17 20:54:56 +08:00
parent 6b317822c5
commit 7b3edfe0c0
1 changed files with 27 additions and 21 deletions
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48
solutions/18_iterators/iterators3.rs
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@ -24,31 +24,31 @@ fn divide(a: i64, b: i64) -> Result<i64, DivisionError> {
Ok(a / b)
}
fn result_with_list(numbers:Vec<i64>,b:i64) -> Result<Vec<i64>, DivisionError> {
fn result_with_list(numbers: Vec<i64>, b: i64) -> Result<Vec<i64>, DivisionError> {
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
let division_results = numbers.into_iter().map(|n| divide(n,b));
let division_results = numbers.into_iter().map(|n| divide(n, b));
// Collects to the expected return type. Returns the first error in the
// division results (if one exists).
match division_results.find(|n|{
match n {
Ok(num)=> return false,
Err(e)=> return true
match division_results.find(|n| match n {
Ok(num) => return false,
Err(e) => return true,
}) {
Some(r) => return Err(r.unwrap_err()),
None => {
let ans: Vec<i64> = division_results
.map(|n| {
return match n {
Ok(num) => return num,
Err(e) => return -1,
};
})
.collect();
return Ok(ans);
}
}) {
Some(r)=> return Err(r.unwrap_err()),
None=>{
let ans:Vec<i64>=division_results.map(|n|{
return match n {
Ok(num)=> return num,
Err(e)=> return -1
}
}).collect();
return Ok(ans);
}
}
}
}
fn list_of_results(numbers:Vec<i64>,b:i64) -> Vec<Result<i64, DivisionError>> {
fn list_of_results(numbers: Vec<i64>, b: i64) -> Vec<Result<i64, DivisionError>> {
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
let division_results = numbers.into_iter().map(|n| divide(n, b));
// Collects to the expected return type.
@ -90,11 +90,17 @@ mod tests {
#[test]
fn test_result_with_list() {
assert_eq!(result_with_list(vec![27, 297, 38502, 81],27), [1, 11, 1426, 3]);
assert_eq!(
result_with_list(vec![27, 297, 38502, 81], 27).unwrap(),
[1, 11, 1426, 3]
);
}
#[test]
fn test_list_of_results() {
assert_eq!(list_of_results(vec![27, 297, 38502, 81],27), [Ok(1), Ok(11), Ok(1426), Ok(3)]);
assert_eq!(
list_of_results(vec![27, 297, 38502, 81], 27),
[Ok(1), Ok(11), Ok(1426), Ok(3)]
);
}
}