net,dgram: return this from ref and unref methods

Modifies the following methods to return the instance instead
of undefined, to allow for chaining these methods:

- net.Server.ref
- net.Server.unref
- net.Socket.ref
- net.Socket.unref
- dgram.Socket.ref
- dgram.Socket.unref

PR-URL: https://github.com/nodejs/io.js/pull/1768
Reviewed-By: Evan Lucas <evanlucas@me.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/dgram.js b/lib/dgram.js
index 1cce233eab..f95b449269 100644
--- a/lib/dgram.js
+++ b/lib/dgram.js
@@ -481,10 +481,14 @@ function onMessage(nread, handle, buf, rinfo) {
 Socket.prototype.ref = function() {
   if (this._handle)
     this._handle.ref();
+
+  return this;
 };
 
 
 Socket.prototype.unref = function() {
   if (this._handle)
     this._handle.unref();
+
+  return this;
 };