Enumeration colors - functions and String

---

• Similar example with colors with functions to convert to RGB and from RGB values.

examples/enums/colors-with-functions-using-strings/src/main.rs

#[derive(Debug, PartialEq)]
#[allow(dead_code)]
enum Color {
    Red,
    Green,
    Blue,
    White,
    Black,
    Other(String),
}


fn to_rgb(color: &Color) -> String {
    return match color {
        Color::Black => String::from("000000"),
        Color::Red => String::from("ff0000"),
        Color::Green => String::from("00ff00"),
        Color::Blue => String::from("0000ff"),
        Color::White => String::from("ffffff"),
        Color::Other(val) => val.clone(),
    }
}

fn from_rgb(rgb: &str) -> Color {
    return match rgb.to_ascii_lowercase().as_str() {
        "000000" => Color::Black,
        "ff0000" => Color::Red,
        "00ff00" => Color::Green,
        "0000ff" => Color::Blue,
        "ffffff" => Color::White,
        val => Color::Other(val.to_owned()),
    }
}

fn main() {
    let background = Color::Black;
    let foreground = Color::White;
    let ink = Color::Black;
    let sky = Color::Blue;
    let other = Color::Other(String::from("4674b9"));

    let experiment = from_rgb("ab89e2");

    println!("{}", background == foreground);
    println!("{}", background == ink);
    println!();

    for color in [background, foreground, ink, sky, other, experiment] {
        println!("{} {:?}", to_rgb(&color), color);
    }
}

false
true

000000 Black
ffffff White
000000 Black
0000ff Blue
4674b9 Other("4674b9")
ab89e2 Other("ab89e2")