allergies.rs

use std::collections::HashMap;
use std::fmt;

#[derive(PartialEq, Eq, Hash, Debug, Copy, Clone)]
pub enum Allergen {
    Eggs = 1,
    Strawberries = 8,
    Peanuts = 2,
    Shellfish = 4,
    Chocolate = 32,
    Pollen = 64,
    Cats = 128,
    Tomatoes = 16
}

impl Allergen {
    fn is_allergic_to(allergen: Allergen) -> bool {
        allergen as i32 >= 1
    }
}

impl fmt::Display for Allergen {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "({})", self)
    }
}

type Allergies = HashMap<Allergen, i32>;

pub fn Allergies(num: i32) -> Vec<Allergen> {
    let mut result = vec![];
    let mut allergies = HashMap::new();

    allergies.insert(Allergen::Eggs, 1);
    allergies.insert(Allergen::Peanuts, 2);
    allergies.insert(Allergen::Shellfish, 4);
    allergies.insert(Allergen::Strawberries, 8);
    allergies.insert(Allergen::Tomatoes, 16);
    allergies.insert(Allergen::Chocolate, 32);
    allergies.insert(Allergen::Pollen, 64);
    allergies.insert(Allergen::Cats, 128);

    // LIFETIMES! ARGHGH!!
    for (key, value) in allergies {
        println!("key: {} val: {}", key, value);
        if value >= num {
            result.push(key)
        }
    }
    result
}
use std::collections::HashMap;
use std::fmt;

#[derive(PartialEq, Eq, Hash, Debug, Copy, Clone)]
pub enum Allergen {
    Eggs = 1,
    Strawberries = 8,
    Peanuts = 2,
    Shellfish = 4,
    Chocolate = 32,
    Pollen = 64,
    Cats = 128,
    Tomatoes = 16
}

impl Allergen {
    fn is_allergic_to(allergen: Allergen) -> bool {
        allergen as i32 >= 1
    }
}

impl fmt::Display for Allergen {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "({})", self)
    }
}

type Allergies = HashMap<Allergen, i32>;

pub fn Allergies(num: i32) -> Vec<Allergen> {
    let mut result = vec![];
    let mut allergies = HashMap::new();

    allergies.insert(Allergen::Eggs, 1);
    allergies.insert(Allergen::Peanuts, 2);
    allergies.insert(Allergen::Shellfish, 4);
    allergies.insert(Allergen::Strawberries, 8);
    allergies.insert(Allergen::Tomatoes, 16);
    allergies.insert(Allergen::Chocolate, 32);
    allergies.insert(Allergen::Pollen, 64);
    allergies.insert(Allergen::Cats, 128);

    // LIFETIMES! ARGHGH!!
    for (key, value) in allergies {
        println!("key: {} val: {}", key, value);
        if value >= num {
            result.push(key)
        }
    }
    result
}