function Stream(host, port, mode) { ... }
Stream.new = function(host, port, mode) { return new Stream(host, port, mode); }
Stream.prototype = Object.create(Object.prototype, {

  readable: { get: function() { ... },
    writable: true, enumerable: false, configurable: true },

  writable: { get: function() { ... },
    writable: true, enumerable: false, configurable: true },

  read: { value: function(callback) { ... },
    writable: true, enumerable: false, configurable: true },

  write: { value: function(data) { ... },
    writable: true, enumerable: false, configurable: true },

  pipe: { value: function(strm) {

    if ( ! (strm instanceof Stream))
      throw new TypeError('Stream.pipe must only be given a valid stream as its first parameter.')

    this.read(strm.write.bind(strm));

  }, writable: true, enumerable: false, configurable: true }
});

function MemoryStream(capacity) { ...

  Object.defineProperty(this, 'buffer', {
    value: new Buffer(capacity), configurable: true
  });
}
MemoryStream.new = function(cap) { return new MemoryStream(cap); }
MemoryStream.prototype = Object.create(Stream.prototype, {

  capacity: { get: function() { return this.buffer.capacity } },
  size: { get: function() { return this.buffer.size } },

  buffer: { value: new Buffer(), configurable: true },

  readable: { get: function() { return this.size > 0 } },
  writable: { get: function() { return this.capacity > this.size } },

  read: { value: function() {

    return buffer.empty();

  }, writable: true, enumerable: false, configurable: true },

  write: { value: function(data) {

    buffer.push(data);

  }, writable: true, enumerable: false, configurable: true },

  }, writable: true, enumerable: false, configurable: true }
);

var strm = Stream.new('127.0.0.1', 8080),
    mstrm = MemoryStream.new(1024);

mstrm.pipe(strm);
mstrm.write('HelloWorld!');