Created
December 31, 2021 20:45
-
-
Save st3fan/18f6682aca758f586371ce8a13d9bf6d to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// Random code from https://docs.microsoft.com/en-ca/learn/paths/rust-first-steps/ | |
use std::fmt; | |
trait Distance<T> { | |
fn distance(&self) -> T; | |
} | |
#[derive(Debug, PartialEq)] | |
struct Point<T> { | |
x: T, | |
y: T | |
} | |
impl fmt::Display for Point<i32> { | |
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | |
write!(f, "({}, {})", self.x, self.y) | |
} | |
} | |
impl fmt::Display for Point<f32> { | |
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | |
write!(f, "({}, {})", self.x, self.y) | |
} | |
} | |
impl Distance<i32> for Point<i32> { | |
fn distance(&self) -> i32 { | |
return self.x * self.y | |
} | |
} | |
impl Distance<f32> for Point<f32> { | |
fn distance(&self) -> f32 { | |
return self.x * self.y | |
} | |
} | |
// fn foo<T>(v: T) -> T { | |
// return v | |
// } | |
struct Numbers { | |
current: i32, | |
end: i32 | |
} | |
impl Numbers { | |
fn new(start: i32, end: i32) -> Numbers { | |
Numbers { | |
current: start, | |
end: end | |
} | |
} | |
} | |
impl Iterator for Numbers { | |
type Item = i32; | |
fn next(&mut self) -> Option<i32> { | |
if self.current == self.end { | |
return None | |
} | |
let v = self.current; | |
self.current += 1; | |
Some(v) | |
} | |
} | |
// | |
struct Container<T> { | |
value: T, | |
} | |
impl<T> Container<T> { | |
pub fn new(value: T) -> Self { | |
Container { value } | |
} | |
} | |
// | |
struct Groups<T> { | |
inner: Vec<T>, | |
} | |
impl<T> Groups<T> { | |
fn new(inner: Vec<T>) -> Self { | |
Groups { inner } | |
} | |
} | |
impl<T: PartialEq> Iterator for Groups<T> { | |
type Item = Vec<T>; | |
fn next(&mut self) -> Option<Self::Item> { | |
if self.inner.is_empty() { | |
return None | |
} | |
let mut out: Vec<T> = Vec::new(); | |
while !self.inner.is_empty() && (out.is_empty() || self.inner[0] == out[0]) { | |
out.push(self.inner.remove(0)) | |
} | |
Some(out) | |
} | |
} | |
// fn next(&mut self) -> Option<Self::Item> { | |
// if self.inner.is_empty() { | |
// return None | |
// } | |
// let mut out: Vec<T> = Vec::new(); | |
// out.push(self.inner.remove(0)); | |
// while !self.inner.is_empty() && self.inner[0] == out[0] { | |
// out.push(self.inner.remove(0)) | |
// } | |
// Some(out) | |
// } | |
// | |
fn main() { | |
let p1 = Point { x: 1, y: 2 }; | |
println!("{}", p1.distance()); | |
let p2 = Point { x: 1.0, y: 2.0 }; | |
println!("{}", p2.distance()); | |
let p3 = Point { x: 11.0, y: 22.0 }; | |
println!("{}", p3.distance()); | |
if p2 != p3 { | |
println!("p2 {} != p3 {}", p2, p3); | |
} | |
let mut n = Numbers::new(100, 200); | |
println!("{}", n.next().unwrap()); | |
println!("{}", n.next().unwrap()); | |
println!("{}", n.next().unwrap()); | |
for n in Numbers::new(7, 13) { | |
println!("{}", n); | |
} | |
// | |
assert_eq!(Container::new(42).value, 42); | |
assert_eq!(Container::new(3.14).value, 3.14); | |
assert_eq!(Container::new("Foo").value, "Foo"); | |
assert_eq!(Container::new(String::from("Bar")).value, String::from("Bar")); | |
assert_eq!(Container::new(true).value, true); | |
assert_eq!(Container::new(-12).value, -12); | |
assert_eq!(Container::new(Some("text")).value, Some("text")); | |
// | |
let data = vec![4, 1, 1, 2, 1, 3, 3, -2, -2, -2, 5, 5]; | |
// groups: |->|---->|->|->|--->|----------->|--->| | |
assert_eq!( | |
Groups::new(data).into_iter().collect::<Vec<Vec<_>>>(), | |
vec![ | |
vec![4], | |
vec![1, 1], | |
vec![2], | |
vec![1], | |
vec![3, 3], | |
vec![-2, -2, -2], | |
vec![5, 5], | |
] | |
); | |
let data2 = vec![1, 2, 2, 1, 1, 2, 2, 3, 4, 4, 3]; | |
// groups: |->|---->|---->|----|->|----->|->| | |
assert_eq!( | |
Groups::new(data2).into_iter().collect::<Vec<Vec<_>>>(), | |
vec![ | |
vec![1], | |
vec![2, 2], | |
vec![1, 1], | |
vec![2, 2], | |
vec![3], | |
vec![4, 4], | |
vec![3], | |
] | |
) | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment