serialport-v5/node_modules/form-data/lib/populate.js

fork with electron support of Node.js package to access serial ports. Linux, OSX and Windows. Welcome your robotic JavaScript overlords. Better yet, program them!

// populates missing values
module.exports = function(dst, src) {

  Object.keys(src).forEach(function(prop)
  {
    dst[prop] = dst[prop] || src[prop];
  });

  return dst;
};