find_mode.js

function findMode(array) {
  var hashOfValues = {};
  for (var i=0; i < array.length; i++) {
    var count = 0;
    var current = array[i];
    for (var j=0; j < array.length; j++) {
      var secondCurrent = array[j];
      if (secondCurrent === current) {
        count += 1;
      }
    }
    hashOfValues[current] = count;
  }

  var highestCount = 0;
  for (var elem in hashOfValues) {
    if (hashOfValues[elem] > highestCount) {
      highestCount = hashOfValues[elem];
    }
  }

  var items = new Array;
  for (var thing in hashOfValues) {
    if (hashOfValues[thing] === highestCount) {
      items.push(Number(thing));
    }
  }
  console.log(items);
}