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Cleanups

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This commit is contained in:
Janggun Lee
2024-07-30 15:26:33 +09:00
parent d34f586e4d
commit af889722bc
64 changed files with 452 additions and 384 deletions
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21
src/assignments/assignment03/custom_operators.rs
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@@ -16,7 +16,7 @@ pub enum MyOption<T> {
/// Converts an `MyOption<String>` into an `MyOption<usize>`, consuming the original:
///
/// ```
/// use cs220::assignments::assignment03::{my_map, MyOption};
/// use cs220::assignments::assignment03::custom_operators::*;
///
/// fn len(s: String) -> usize {
/// s.len()
@@ -29,14 +29,15 @@ pub fn my_map<T, U, F: FnOnce(T) -> U>(v: MyOption<T>, f: F) -> MyOption<U> {
todo!()
}
/// Returns `MyNone` if the option is `MyNone`, otherwise calls `f` with the wrapped value and returns the result.
/// Returns `MyNone` if the option is `MyNone`, otherwise calls `f` with the wrapped value and
/// returns the result.
///
/// Some languages call this operation flatmap.
///
/// # Examples
///
/// ```
/// use cs220::assignments::assignment03::{MyOption, my_and_then};
/// use cs220::assignments::assignment03::custom_operators::*;
///
/// fn pos_then_to_string(x: isize) -> MyOption<String> {
/// if x > 0 {
@@ -54,21 +55,21 @@ pub fn my_and_then<T, U, F: FnOnce(T) -> MyOption<U>>(v: MyOption<T>, f: F) -> M
todo!()
}
/// Custom operator: `option_op_or(v1, v2, f)`
/// If neither `v1` nor `v2` is `Some`, returns `None`.
/// If exactly one is `Some`, returns the same `Some` value.
/// If both are `Some`, apply the values inside `Some` to `f` and wrap the resulting value inside `Some`.
/// Custom operator: `option_op_or(v1, v2, f)`. If neither `v1` nor `v2` is `Some`, returns `None`.
/// If exactly one is `Some`, returns the same `Some` value. If both are `Some`, apply the values
/// inside `Some` to `f` and wrap the resulting value inside `Some`.
///
/// # Examples
///
/// ```
/// use cs220::assignments::assignment03::custom_operators::*;
/// fn product(a: i32, b: i32) -> i32 {
/// a * b
/// }
///
/// assert_eq!(option_op_or(None, None, product), None);
/// assert_eq!(option_op_or(Some(3), None, product), Some(3));
/// assert_eq!(option_op_or(Some(3), Some(5), product), Some(15));
/// assert_eq!(my_option_op_or(MyOption::MyNone, MyOption::MyNone, product), MyOption::MyNone);
/// assert_eq!(my_option_op_or(MyOption::MySome(3), MyOption::MyNone, product), MyOption::MySome(3));
/// assert_eq!(my_option_op_or(MyOption::MySome(3), MyOption::MySome(5), product), MyOption::MySome(15));
/// ```
pub fn my_option_op_or<T, F: FnOnce(T, T) -> T>(
v1: MyOption<T>,