04. Store Catalogue

function storeCatalogue(input) {
  const map = new Map();

  input.forEach((line) => {
    const tokens = line.split(' : ');
    const [product, price] = tokens;
    map.set(product, price);
  });

  const initials = new Set();
  Array.from(map.keys()).forEach((k) => initials.add(k[0]));


  Array.from(initials.keys()).sort().forEach((char) => {
    console.log(char);

    Array.from(map.keys()).sort().forEach((product) => {
      if (product.startsWith(char)) {
        console.log(`  ${product}: ${map.get(product)}`);
      }
    });
  });
}