Finding Max Price Within Different Ranges Of "PriceObject"

findWithinRange.js

var priceObject = [
    {
      min: "1",
      max: "100",
      price: "0.5"
    },
    {
      min: "101",
      max: "500",
      price: "0.2"
    },
    {
      min: "501",
      max: "2000",
      price: "0.05"
    }
  ],
  rangeFromForm = 1000;

var isBetween = function (num, a, b) {
    var min = Math.min.apply(Math, [a,b]),
        max = Math.max.apply(Math, [a,b]);
    return num > min && num < max;
};

var getMaxPriceForRange = function(number, priceObj) {
  let priceArray = priceObj.map(function(priceElement) {
    if (isBetween(number, priceElement.min, priceElement.max)) {
      return Number(priceElement.price);
    }
  });

  return Math.max.apply(null, priceArray.filter(Number));
}

// This was another way, but it only looks at max numbers, not the min and max...
// function getPriceForRange(range, priceObj) {
//   return priceObj[_.uniq(_.pluck(priceObj, "max")).filter((max) => { return range > max; }).length].price;
// }