issues with delete item in array with swift 3 - swift3

Question

i have an problem with delete item from array i try to solve it long time but i couldn't
my problem is :
i have dictionary[Int:String] which contain items, the user select these items from the table view cell for delete it after,
this dictionary have an item from type string and with key key is indexPath.row
the following my dictionary code:
var dictionaryOfItems = [Int:String]()
dictionaryOfItems.updateValue("Banana", forKey: 0)
dictionaryOfItems.updateValue("Cucumber", forKey: 3)
and i have an array which contains array of item type string
the following code is my array :
var array :[String] = ["Banana","Apple","Orange","Cucumber","lettuce","Milk","Tea"]
i need to delete items from array which dictionarOfItems contain it's
when i try to delete the items from array i get the error message index out off range how can i fix it please
the following is my full code:
var array :[String] = ["Banana","Apple","Orange","Cucumber","lettuce","Milk","Tea"]
var dictionaryOfItems = [Int:String]()
dictionaryOfItems.updateValue("Banana", forKey: 0)
dictionaryOfItems.updateValue("Cucumber", forKey: 3)
for (index,_) in dictionaryOfItems {
if array[index] == dictionaryOfItems[index] {
array.remove(at: index)
}
}

Answer 1

Instead of explicitly removing item from your array, you can simply filter using a predicate:
Filtering our elements whose associated array index (say idx) corresponds to a key in you dictionary dictionaryOfItems whose value equals that of the array element.
E.g.:
array = array.enumerated()
.filter { (idx, _) in dictionaryOfItems[idx] != array[idx] }
.map { $0.1 }
print(array) // ["Apple", "Orange", "lettuce", "Milk", "Tea"]
It seems like quite a roundabout way, however; to use a dictionary to track the every-changing element indices in your mutatable array (this, in particular, is the reason of your runtime error). Are you sure you want a dictionary to track indices and elements in an array, where the latter is, inherently, a collection of elements and associated indices?
On another note, if your predicate is in fact simpler (just removes items which are present as values in a dictionary; without need of matching tracked indices), you could use a much simpler filter approach:
array = array.filter { !dictionaryOfItems.values.contains($0) }
print(array) // ["Apple", "Orange", "lettuce", "Milk", "Tea"]

Answer 2

Try this:
var array :[String] = ["Banana","Apple","Orange","Cucumber","lettuce","Milk","Tea"]
var dictionaryOfItems = [Int:String]()
dictionaryOfItems.updateValue("Banana", forKey: 0)
dictionaryOfItems.updateValue("Cucumber", forKey: 3)
var indexes = dictionaryOfItems.keys.sorted().reversed()
for index in indexes {
if array[index] == dictionaryOfItems[index] {
array.remove(at: index)
}
}