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const players = {itamar: 1200, eddie: 1210, eli: 1183, uriel: 1201};
const sortedPlayers = 
  Object.keys(players) // Convert all object keys to an array
  .map(p => ({name: p, rank: players[p]})) // Map to wanted object
  .sort(function(a, b) { // Sort!
    return b.rank - a.rank;
  });
               
console.log(sortedPlayers); // Done!