This class can manipulate a collection of item values using arrays.

It provides several functions to manipulate the items of a collection.

Currently, it can:

- Get the list of collection items

- Get a string to represent the collection items in JSON format

- Get the value of the first collection item

- Get the value of the last collection item

- Get the count of items in the collection

- Traverse the collection items and invoke a callback function for each value

- Traverse the collection items and invoke a callback function for each value

- Traverse the collection items and invoke a callback function for each item

- Traverse the collection items and invoke a filter function for all items

- Traverse the collection items and invoke a map function for all items

- Get an iterator object to traverse all collection items