Update individualCommands.js

Clean code

Author: leibale

lib/individualCommands.js

@@ -180,12 +180,7 @@ Multi.prototype.info = Multi.prototype.INFO = function info (section, callback)
     return this;
 };
 
-function auth_callback (self, user, pass, callback) {
-    // Backward compatibility support for auth with password only
-    if (user instanceof Function) {
-        callback = user;
-        user = null;
-    }
+function auth_callback (self, pass, user, callback) {
     return function (err, res) {
         if (err) {
             if (no_password_is_set.test(err.message)) {
@@ -205,7 +200,7 @@ function auth_callback (self, user, pass, callback) {
     };
 }
 
-RedisClient.prototype.auth = RedisClient.prototype.AUTH = function auth (user, pass, callback) {
+RedisClient.prototype.auth = RedisClient.prototype.AUTH = function auth (pass, user, callback) {
     debug('Sending auth to ' + this.address + ' id ' + this.connection_id);
 
     // Backward compatibility support for auth with password only
@@ -220,16 +215,16 @@ RedisClient.prototype.auth = RedisClient.prototype.AUTH = function auth (user, p
     this.ready = ready || this.offline_queue.length === 0;
     var tmp;
     if (user) {
-        tmp = this.internal_send_command(new Command('auth', [user, pass], auth_callback(this, user, pass, callback)));
+        tmp = this.internal_send_command(new Command('auth', [user, pass], auth_callback(this, pass, user, callback)));
     } else {
-        tmp = this.internal_send_command(new Command('auth', [pass], auth_callback(this, pass, callback)));
+        tmp = this.internal_send_command(new Command('auth', [pass], auth_callback(this, pass, user, callback)));
     }
     this.ready = ready;
     return tmp;
 };
 
 // Only works with batch, not in a transaction
-Multi.prototype.auth = Multi.prototype.AUTH = function auth (user, pass, callback) {
+Multi.prototype.auth = Multi.prototype.AUTH = function auth (pass, user, callback) {
     debug('Sending auth to ' + this.address + ' id ' + this.connection_id);
 
     // Backward compatibility support for auth with password only
@@ -240,11 +235,7 @@ Multi.prototype.auth = Multi.prototype.AUTH = function auth (user, pass, callbac
     // Stash auth for connect and reconnect.
     this.auth_pass = pass;
     this.auth_user = user;
-    if (user) {
-        this.queue.push(new Command('auth', [user, pass], auth_callback(this._client, callback)));
-    } else {
-        this.queue.push(new Command('auth', [pass], auth_callback(this._client, callback)));
-    }
+    this.queue.push(new Command('auth', user ? [user, pass] : [pass], auth_callback(this._client, pass, user, callback)));
     return this;
 };