added transformAsync

Author: Michael

README.md

@@ -74,12 +74,19 @@ You can read this as follows:
 - Run Data.parse on the date value.
 - Run each function on all items after mapping and operations.
 
-Run it
+Run it synchronously
 ```javascript
 var dataTransform = DataTransform(data, map);
 var result = dataTransform.transform();
 console.log(result);
 ```
+... or asynchronously
+```javascript
+var dataTransform = DataTransform(data, map);
+var result = dataTransform.transformAsync(function(result){
+	console.log(result);
+});
+```
 
 The expected output.
 ```javascript
@@ -340,6 +347,8 @@ The expected output.
 Enjoy!
 
 ## Changelog
+1.0.18 Introducing transformAsync which returns a promise.
+1.0.17 Ensure transform always returns an array
 1.0.16 ES5 compatibility  
 1.0.15 Add support for a context object that is passed through to the operate.run and each functions.  
 1.0.14 Add support for default values via "defaults" definition.  Add support for removing attributes via the "remove" definition.  

index.js

@@ -90,6 +90,16 @@ exports.DataTransform = function(data, map){
 
 		},
 
+		transformAsync : function(context) {
+			return new Promise(function(resolve, reject) {
+				try {
+					resolve(this.transform(context))
+				} catch (err) {
+					reject(err);
+				}
+			}.bind(this));
+		},
+
 		removeAll: function(data){
       if (_.isArray(map.remove)) {
         return _.each(data, this.remove)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "node-json-transform",
-  "version": "1.0.17",
+  "version": "1.0.18",
   "description": "A node module for transforming and performing operations on JSON.",
   "main": "index.js",
   "scripts": {

test/nodeDataTransformSpec.js

@@ -68,6 +68,21 @@ describe("node-json-transform", function() {
 
 	});
 
+	it("should transform data asynchronously", function() {
+
+		var dataTransform = DataTransform(_.clone(data), map);
+		dataTransform.transformAsync().then(function(result){
+			expect(result).toEqual([{
+				name: "TITLE1",
+				info: "description1",
+				text: "This is a blog.",
+				date: Date.parse('11/4/2013'),
+				link: "http://goo.cm",
+				info: "mike"
+			}]);
+		});
+	});
+
 	it("should allow you to clear out fields", function() {
 
 		// Add a map item to  clear out the "clearMe" field.