Implement multiple flash messages support.

examples/express2/app.js

@@ -32,6 +32,11 @@ app.get('/flash', function(req, res){
   res.redirect('/');
 });
 
+app.get('/multiple-flash', function(req, res){
+    req.flash('info', ['Welcome', 'Please Enjoy']);
+    res.redirect('/');
+});
+
 app.get('/no-flash', function(req, res){
   res.redirect('/');
 });

examples/express3/app.js

@@ -34,4 +34,9 @@ app.get('/no-flash', function(req, res){
   res.redirect('/');
 });
 
+app.get('/multiple-flash', function(req, res){
+    req.flash('info', ['Welcome', 'Please Enjoy']);
+    res.redirect('/');
+});
+
 app.listen(3000);

lib/flash.js

@@ -2,6 +2,7 @@
  * Module dependencies.
  */
 var format = require('util').format;
+var isArray = require('util').isArray;
 
 
 /**
@@ -63,6 +64,11 @@ function _flash(type, msg) {
     if (arguments.length > 2 && format) {
       var args = Array.prototype.slice.call(arguments, 1);
       msg = format.apply(undefined, args);
+    } else if (isArray(msg)) {
+        msg.forEach(function(val){
+            (msgs[type] = msgs[type] || []).push(val);
+        });
+        return msgs;
     }
     return (msgs[type] = msgs[type] || []).push(msg);
   } else if (type) {

test/flash-test.js

@@ -61,6 +61,13 @@ vows.describe('flash').addBatch({
         assert.lengthOf(Object.keys(req.session.flash), 1);
         assert.lengthOf(req.session.flash['info'], 2);
       },
+      'should set flash messages in one call' : function(err, req, res) {
+        req.flash('warning', ['username required', 'password required']);
+        var msgs = req.flash('warning');
+        assert.lengthOf(msgs, 2);
+        assert.equal(msgs[0], 'username required');
+        assert.equal(msgs[1], 'password required');
+      },
       'should get and clear multiple previously set flash messages' : function(err, req, res) {
         var msgs = req.flash('info');
         assert.lengthOf(msgs, 2);