playframework/Play20 — pull request #860 by guillaumebort (2013-03-15 10:19:22+00:00)
Title: Fix issue #859 - Add a `JsPath.transform` operation to update a Json tree.

Such as:

```
(__ \ "user" \ "email").transform(userJson) { oldEmail =>
JsString("coco@playframework.com")
}
```