code: function objReduceLeft(callback/*, initialValue = UNDEFINED*/) {
      const args = Array.prototype.slice.call(arguments, 0);
      args.unshift(each);
      return objReduceIterated.apply(this, args);
  }
docs: reduce function applied to object's and array's own properties not just indexed contents
  where order of reduction is left to right, first indexed properties, then ascii sorted
  non-indexed properties
  
  @this        array or object
  @param callback function taking (prevValue, value, key, collection) and returning reduced
  value if BREAK returned then the result will be the accumulated value up to this point,
  or if BREAK(arg) is returned then the result will be arg
  //@param initialValue what to use for initial reduced value instead of array element
  @return {boolean} whether callback returned true for all keys/values