# Object Transformers

Object transformers can be used on a value data type of `Array`, including dictionaries coming from other transformers, such as by using dot notation on another dictionary. Following transformers are available:

## `keys`

Returns `Array` with all keys of the source dictionary.

* Usage: `.keys()`
* Example usage: `dictionary.keys()`
* Example return: `["bob": "ferrari", "dan": "lada"]` to `["bob", "dan"]`

## `values`

Returns `Array` with all values of the source dictionary.

* Usage: `.values()`
* Example usage: `dictionary.values()`
* Example return: `["bob": "ferrari", "dan": "lada"]` to `["ferrari", "lada"]`

## `add`

Returns copy of the source dictionary extended by provided `key`: `value`. Value can be either plain value or evaluated piece of context.

* Usage: `.add(key, value)`
* Example usage: `value.add("Also Bob", self.bob)`
* Example return: `["bob": "ferrari", "dan": "lada"]` to `["bob": "ferrari", "dan": "lada", "Also Bob": "ferrari"]`

## `count`

Returns the number of key-value pairs in the collection. Note that if the dictionary is nested, it will not count the size of nested elements, only key-value pairs of the root level.

* Usage: `.count()`
* Example usage: `dictionary.count()`
* Example return: `["bob": "ferrari", "dan": "lada"]` to `2` 


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