set value to false if there is a duplicate

Question

i don't know if there's a solution to this problem but here's what i want to do, i have this array

array=[
{'id': 1, 'isActive': true, 'name': apple}, 
{'id': 2, 'isActive': false, 'name': orange},
{'id': 3, 'isActive': false, 'name': apple}, 
{'id': 4, 'isActive': false, 'name': apple}, 
{'id': 5, 'isActive': false, 'name': orange},
{'id': 6, 'isActive': false, 'name': forest}
{'id': 7, 'isActive': false, 'name': forest}
]

i want to map through this array but i only want to show the array without duplicates but without changing the array ! i was thinking about adding another value so it will be like this

array=[
{'id': 1, 'isActive': true, 'name': apple, 'isShown': true}, 
{'id': 2, 'isActive': false, 'name': orange, 'isShown': true},
{'id': 3, 'isActive': false, 'name': apple, 'isShown': false}, 
{'id': 4, 'isActive': false, 'name': apple, 'isShown': false}, 
{'id': 5, 'isActive': false, 'name': orange, 'isShown': false},
{'id': 6, 'isActive': false, 'name': forest, 'isShown': true},
{'id': 7, 'isActive': false, 'name': forest, 'isShown': false},
]

I thought about this but i didn't know how to do it :x Any help or tips ?