09. Catalogue (Objects&Classes Exercise)

function solve(input){
let output = [];
    for (const line of input) {
        let[product, price] = line.split(' : ');
        let singleObj = {product,price};

        output.push(singleObj);
    }

    output.sort((a,b)=>a.product.localeCompare(b.product));
    let firstLetter = output.map(item=>{
        return item.product[0];

    });

    let uniqFirstLetter = [];
    for (const letter of firstLetter) {
            if(!uniqFirstLetter.includes(letter)){
                uniqFirstLetter.push(letter);
            }
    }

    for (const object of output) {
        let first = object.product[0];
        if(first === uniqFirstLetter[0]){
            console.log(uniqFirstLetter.shift());
        }
        console.log(`  ${object.product}: ${object.price}`);
    }

}