Ranking sorting and Average

sort.js

// Sort Arr by Ranking
function sortByRanking(arr) {
  let compare = function (a,b) {
    if (a.ranking < b.ranking) {
      return -1;
    } else if (a.ranking > b.ranking) {
      return 1;
    } else {
      return 0;
    }
  };

  return arr.sort(compare);
}

// Find Average of rankings
function averageRanking(arr) {
  let totalValues = arr.length;
  let sum = 0;
  
  arr.forEach(function (obj) {
    sum += +item.ranking;
  });
  
  return sum/totalValues;
}