Added transform() method

lib/form2json.js

@@ -1,13 +1,3 @@
-exports.decode = function(data) {
-    return data.split('&').map(splitPair).reduce(fillIn(), {});
-};
-
-/**
- * A safe and fast alternative to decodeURIComponent
- */
-exports.unescape = process.binding("http_parser").urlDecode;
-
-
 /**
  * Returns the specified property of the given object. If the object has no such property,
  * the property is set to the given value.
@@ -82,3 +72,29 @@ function splitPair(pair) {
 		value: exports.unescape(s.join('=')) || ''
 	};
 }
+
+/**
+ * Decodes the given x-www-form-encoded String. Refer to README.md for details.
+ */
+exports.decode = function(data) {
+	return data.split('&').map(splitPair).reduce(fillIn(), {});
+};
+
+/**
+ * Transforms a flat object into a hierarchy using the same rules as decode().
+ */
+exports.transform = function(obj) {
+	var pairs = [];
+	for (var name in obj) {
+		if (obj.hasOwnProperty(name)) {
+			pairs.push({ name: name, value: obj[name] });
+		}
+	}
+	return pairs.reduce(fillIn(), {});
+};
+
+var rplus = /\+/g;
+
+exports.unescape = function(s) {
+	return process.binding("http_parser").urlDecode(s).replace(rplus, ' ');
+};