e025: Traits Deep Dive, Part III

Closure traits, `impl trait`, `dyn trait`, and object safety!

July 5, 201820m 36s

Audio is streamed directly from the publisher (podtrac.com) as published in their RSS feed. Play Podcasts does not host this file. Rights-holders can request removal through the copyright & takedown page.

Original episode page

Show Notes

Closure traits, `impl trait`, `dyn trait`, and object safety!

Show Notes

Sponsored by Parity Technologies! Parity is hiring Rust developers so if you’re interested, you should check out their job listings!

Example

You can see all of the pieces of the final example described in the show here (and the module has the required definitions for Point).

let points = vec![
    Point { x: 1.0, y: 2.0 },
    Point { x: 12.0, y: 4.3 },
    Point { x: -5.4, y: 18.7 },
];

let origin = Point::default();

// This is the version we start with. It works fine, but it's not elegant.
let distances_inline: Vec<f32> = points
    .iter()
    .map(|point| {
        let change = point - &origin;
        (change.x.powi(2) + change.y.powi(2)).sqrt()
    })
    .collect();

// This version is *much* cleaner!
let distances_impl: Vec<f32> = points.iter().map(distance_from_impl(&origin)).collect();

Contact

New Rustacean:
- Twitter: @newrustacean
- Email: [email protected]
Chris Krycho
- GitHub: chriskrycho
- Twitter: @chriskrycho

← All episodes of New Rustacean

e025: Traits Deep Dive, Part III

Show Notes

Show Notes

Links

Example

Sponsors

Contact

e025: Traits Deep Dive, Part III

Show Notes

Show Notes

Links

Example

Sponsors

Become a sponsor

Contact