Array and Object Handling: Manipulate arrays and objects

This class can be used to perform several types of manipulation operations of arrays and objects.

It can:

- Swap the position of two array elements
- Recreate the indexes of an array to make them start from 0 and end in array element count minus one.
- Get the index key of the last element
- Move array elements to new positions
- Remove elements from an array
- Create an array from the variables of an object
- Remove elements set to null
- Sort array elements
- Create an array with number elements of a given interval