sorting hat https://codesandbox.io/s/js-tourney-zdtvqg?file=/src/index.js

sorting.js

const crownRanges = [
  { hat: "1st hat", min: 0, max: 1499 },
  { hat: "2nd hat", min: 1500, max: 2999 },
  { hat: "3rd hat", min: 3000, max: 4499 },
  { hat: "4th hat", min: 4500, max: Infinity }
];

const players = [
  { name: "Beefy", crowns: 1800 },
  { name: "violetti_lohis", crowns: 1200 },
  { name: "Auron956", crowns: 3650 },
  { name: "Archsine", crowns: 1446 },
  { name: "unknown", crowns: 3234 },
  { name: "air_bobby", crowns: 4500 },
  { name: "Bishop", crowns: 5000 },
  { name: "Riemer", crowns: 2739 },
  { name: "akumasimba", crowns: 3600 },
  { name: "LAOS", crowns: 5600 },
  { name: "janarca", crowns: 6000 },
  { name: "loki4910lofiti", crowns: 2300 },
  { name: "galaxystar4041", crowns: 1250 },
  { name: "HUNT3R", crowns: 3000 },
  { name: "golden_socks", crowns: 550 },
  { name: "katdog88", crowns: 3200 },
  { name: "laurax534", crowns: 4500 },
  { name: "squirrelburrito", crowns: 2100 },
  { name: "Altf23", crowns: 1900 },
  { name: "shinykip82", crowns: 663 },
  { name: "Its-ryma", crowns: 3370 },
  { name: "Emz", crowns: 503 },
  { name: "achieverrr", crowns: 2889 },
  { name: "FullNappy", crowns: 6000 }
];

function initializeHatGroups(crownRanges) {
  const hatGroups = {};

  crownRanges.forEach((range) => {
    hatGroups[range.hat] = [];
  });

  return hatGroups;
}

const hatGroups = initializeHatGroups(crownRanges);

function groupPeopleByHats(people) {
  return people.reduce((groups, person) => {
    const hat = crownRanges.find((range) => {
      return person.crowns >= range.min && person.crowns <= range.max;
    });

    if (hat) {
      groups[hat.hat].push(person);
    }

    return groups;
  }, hatGroups);
}

const groupedPeople = groupPeopleByHats(players);

console.log(groupedPeople);