Add the cursor.map function

index.js

@@ -88,6 +88,13 @@ Cursor.prototype.destroy = function() {
 	this.push(null);
 };
 
+Cursor.prototype.map = function(mapfn, callback) {
+	this.toArray(function(err, arr) {
+		if (err) return callback(err);
+		callback(null, arr.map(mapfn))
+	});
+};
+
 Cursor.prototype._apply = function(fn, args) {
 	this._get(function(err, cursor) {
 		if (err) return getCallback(args)(err);

tests/test-cursor-map.js

@@ -0,0 +1,18 @@
+var assert = require('assert');
+var insert = require('./insert');
+
+insert([{
+	hello:'world1'
+},{
+	hello:'world2'
+}], function(db, done) {
+	var cursor = db.a.find();
+	cursor.map(function(x) { 
+		return x.hello 
+	}, function(err, res) {
+		assert.equal(res[0], 'world1');
+		assert.equal(res[1], 'world2');
+		done();
+	});
+});
+