Create a array filled with range of numbers

rangedArray.js

function rangedArray(start, end){
    if (arguments.length === 1) {
      end = start;
      start = 0;
    }
    end = end || 0;
    var step = 1;

    for (var result = []; ((end - start) * step) > 0; start += step) {
      result.push(start);
    }
    result.push(end);
    return result;
  }