Objects and Classes - Exercise - 09. Catalogue

function solve(input) {
    let catalogue = {};
    const alphaSort = (a, b) => a.localeCompare(b);

    for (let line of input){
        let [name, price] = line.split(" : ");
        price = Number(price);
        let initial = name[0];

        if (!catalogue.hasOwnProperty(initial)){
            catalogue[initial] = {};
        }

        let products = catalogue[initial]

        if (!products.hasOwnProperty(name)){
            products[name] = price;
        }
    }

    let sortedInitials = Object.keys(catalogue).sort(alphaSort);

    for (let initial of sortedInitials){
        console.log(initial);

        let products = catalogue[initial];
        let sortedProducts = Object.keys(products).sort(alphaSort);

        for(let p of sortedProducts){
            console.log(`  ${p}: ${products[p]}`);
        }
    }
}