Reposted by Kylee Tilley
Kylee Tilley
@testingrequired.com
326 followers 695 following 1.9K posts
Changing hearts & minds about dev & testing. ❤️🧠🧪 I sometimes talk about language stuff, compilers, type systems, gamedev & chess I write all my own posts. Expct typos! Some stuff I work on: github.com/kyleect Rarely updated: testingrequired.com
![Screenshot of an implementation of a Box[T] struct in my language
```
struct Box[T] {
pub var value: T;
}
impl Box[T] {
pub fun new(value: T): Self[T] = Self {
value: value
};
pub fun get(self): T = self.value;
pub fun map[U](self, map: fun (T) => U): Self[U] = Self.new(map(self.value));
}
let box_a = Box.new(5);
let box_b = box_a.map(fun (value: f64): f64 { value * 2 });
print box_a.get(); // 5
print box_b.get(); // 10
```](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:gqeqw2xsukgwd5kdiieufubh/bafkreigiluqkt6pkyisc3fpecnsuaiurbyo2rl5poos37ycunqyjdnymty)
