code: function arraysCombineAdapter(to, from, merge)
  {
    // transfer actual values
    from.reduce(function(target, value, index)
    {
      // combine elements index to index
      target[index] = merge(target[index], value);
  
      return target;
    }, to);
  
    return to;
  }
docs: Adapter to merge arrays
  by combining/merging it's elements
  
  @param   {array} to - target array to update
  @param   {array} from - array to clone
  @param   {function} merge - iterator to merge sub elements
  @returns {array} - modified target object