net: use object destructuring

PR-URL: #20959
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: starkwang

lib/net.js

@@ -82,8 +82,7 @@ const kLastWriteQueueSize = Symbol('lastWriteQueueSize');
 letcluster;
 letdns;
 
-consterrnoException=errors.errnoException;
-constexceptionWithHostPort=errors.exceptionWithHostPort;
+const{ errnoException, exceptionWithHostPort }=errors;
 
 const{
  kTimeout,
@@ -244,7 +243,7 @@ function Socket(options) {
 
 options.readable=options.readable||false;
 options.writable=options.writable||false;
-constallowHalfOpen=options.allowHalfOpen;
+const{allowHalfOpen }=options;
 
 // Prevent the "no-half-open enforcer" from being inherited from `Duplex`.
 options.allowHalfOpen=true;
@@ -259,7 +258,7 @@ function Socket(options) {
 this._handle=options.handle;// private
 this[async_id_symbol]=getNewAsyncId(this._handle);
 }elseif(options.fd!==undefined){
-constfd=options.fd;
+const{fd }=options;
 this._handle=createHandle(fd,false);
 this._handle.open(fd);
 this[async_id_symbol]=this._handle.getAsyncId();
@@ -434,7 +433,7 @@ Socket.prototype._onTimeout = function() {
 if(lastWriteQueueSize>0&&handle){
 // `lastWriteQueueSize !== writeQueueSize` means there is
 // an active write in progress, so we suppress the timeout.
-constwriteQueueSize=handle.writeQueueSize;
+const{writeQueueSize }=handle;
 if(lastWriteQueueSize!==writeQueueSize){
 this[kLastWriteQueueSize]=writeQueueSize;
 this._unrefTimer();
@@ -956,7 +955,7 @@ Socket.prototype.connect = function(...args) {
 this._sockname=null;
 }
 
-constpath=options.path;
+const{path }=options;
 varpipe=!!path;
 debug('pipe',pipe,path);
 
@@ -991,10 +990,8 @@ Socket.prototype.connect = function(...args) {
 
 
 functionlookupAndConnect(self,options){
+var{ port, localAddress, localPort }=options;
 varhost=options.host||'localhost';
-varport=options.port;
-varlocalAddress=options.localAddress;
-varlocalPort=options.localPort;
 
 if(localAddress&&!isIP(localAddress)){
 thrownewERR_INVALID_IP_ADDRESS(localAddress);