## Json Pointers

Vert.x provides an implementation of Json Pointers from RFC6901. You can use pointers both for querying and for writing. You can build your `JsonPointer` using a string, a URI or manually appending paths:

    var JsonPointer = require("vertx-js/json_pointer");
    // Build a pointer from a string
    var pointer1 = JsonPointer.from("/hello/world");
    // Build a pointer manually
    var pointer2 = JsonPointer.create().append("hello").append("world");

After instantiating your pointer, use `queryJson` to query a JSON value. You can update a Json Value using `writeJson`:

    // Query a JsonObject
    var result1 = objectPointer.queryJson(jsonObject);
    // Query a JsonArray
    var result2 = arrayPointer.queryJson(jsonArray);
    // Write starting from a JsonObject
    objectPointer.writeJson(jsonObject, "new element");
    // Write starting from a JsonObject
    arrayPointer.writeJson(jsonArray, "new element");

You can use Vert.x Json Pointer with any object model by providing a custom implementation of `JsonPointerIterator`