added function binding

Readme.md

@@ -1,7 +1,7 @@
 Introduction
 ============
 
-Mongode is a very thin (~200 lines of code) wrapper around the [node-mongodb-native](https://github.com/christkv/node-mongodb-native) driver. It's main purpose is to reduce the amount of function call nesting that is usually needed with the native driver. It does this by buffering commands until the appropriate objects are available.
+Mongode is a very thin (~200 lines of code) wrapper around the [node-mongodb-native](https://github.com/christkv/node-mongodb-native) driver. It's main purpose is to reduce the amount of function call nesting that is usually needed with the native driver. It does this by buffering commands until the appropriate objects are available.  
 
 Installation
 ============
@@ -29,9 +29,23 @@ node-mongodb-native:
 mongode:
 
     var mongode = require('mongode');
-    var db = new mongode.Database('test', 'mongodb://127.0.0.1');
-    var collection = db.collection('test_collection');
+    var test = mongode.connect('test', 'mongodb://127.0.0.1');
+    var collection = test.collection('test_collection');
     collection.insert({hello: 'world'}, {safe:true}, function(err, objects) {
       if (err) console.warn(err.message);
     });
 
+Binding
+-------
+
+You can bind databases and collections by name:
+
+    var mongode = require('mongode');
+    mongode.connect('test', 'mongodb://127.0.0.1');
+
+    var test = mongode.test;
+    test.collection('foo');
+    test.collection('bar');
+
+    test.foo.find().each(function(err, object) {});
+    test.bar.find().each(function(err, object) {});

index.js

@@ -1 +1,12 @@
-module.exports = require('./lib/db.js');
+var db = require('./lib/db.js');
+
+function connect(name, serverURIs, options) {
+    if (!exports[name]) {
+        exports[name] = new db.Database(name, serverURIs, options);
+    }
+
+    return exports[name];
+}
+
+exports.connect = connect;
+exports.Database = db.Database;

lib/db.js

@@ -40,6 +40,10 @@ var Database = function(name, serverURIs, options) {
 util.inherits(Database, EventEmitter);
 
 Database.prototype.collection = function(name) {
+    if (this[name]) {
+        return this[name];
+    }
+
     var self = this,
         collection = new Collection(name);
 
@@ -51,6 +55,8 @@ Database.prototype.collection = function(name) {
         })
     }
 
+    this[name] = collection;
+
     return collection;
 }