Sort a series of players by a rank into a series of teams

sort-teams.js

const points = {
    'immortal': 7,
    'diamond': 6,
    'platinum': 5,
    'gold': 4,
    'silver': 3,
    'bronze': 2,
    'iron': 1,
};

const players = [
    { name: 'a', rank: 'immortal' },
    { name: 'b', rank: 'immortal' },
    { name: 'c', rank: 'diamond' },
    { name: 'd', rank: 'diamond' },
    { name: 'e', rank: 'diamond' },

    { name: 'f', rank: 'platinum' },
    { name: 'g', rank: 'platinum' },
    { name: 'h', rank: 'platinum' },
    { name: 'i', rank: 'platinum' },
    { name: 'j', rank: 'platinum' },

    { name: 'k', rank: 'gold' },
    { name: 'l', rank: 'gold' },
    { name: 'm', rank: 'gold' },
    { name: 'n', rank: 'gold' },
    { name: 'p', rank: 'silver' },

    { name: 'q', rank: 'silver' },
    { name: 'r', rank: 'silver' },
    { name: 's', rank: 'silver' },
    { name: 't', rank: 'bronze' },
    { name: 'u', rank: 'iron' },
];

const numTeams = players.length / 5;
console.log(`Creating ${numTeams} teams...`);

const teams = [];
for (let i = 0; i < numTeams; i++) {
  teams.push([]);
}

const teamPoints = team => team.reduce((s, p) => s + points[p.rank], 0);


for (const player of players) {
  const pv = points[player.rank];

  const lowestTeam = teams.sort((t1, t2) => {
    const t1p = teamPoints(t1);
    const t2p = teamPoints(t2);
    return t1p - t2p;
  })[0];

  lowestTeam.push(player);
}


let teamIndex = 1;

for (const team of teams) {
  console.log(`Team ${teamIndex++} (${teamPoints(team)} points):`);
  for (const player of team) {
    console.log(`  ${player.name} - ${player.rank}`);
  }
  console.log('');
}