useful when working with nested data structures.

the path defines the way to the object . the given object will be returned

given an object like this:

{
    "data": { 
        "persons": [ 
            {
                "name": "alyx"
            },
            {
                "name": "eli"
            },
            {
                "name": "gordon"
            }
        ] 
    }
}

a path of data.persons.1 will result in this object:

{
  "name": "eli"
}