Collection select items on aggregate unique values

Asked by: Stefano Maglione

is there a way to select from a collection items on unique values?
For example:

    {
        "identifier": 1,
        "name": "Robert",
        "lastname": "Brown",
        "age": "30"
    },
    {
        "identifier": 2,
        "name": "Robert",
        "lastname": "Brown",
        "age": "30"
    }

In this collection I would like to get only one of the two items because they have same name,lastname and age.

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