CODEWITHSUNDEEP
iosswiftdictionary
Tamarisk
Tamarisk

Reputation: 939

Get keys of Dictionary in array in original order

Let's say I have a dictionary

let dict = [
    "Joe":"D.",
    "Ben":"K.",
    "Kyle":"R.",
    "Matt":"L."
]

If I wanted an array of the keys of this dictionary I do:

let keys = Array(dict.keys)

But this prints in a seemingly random order:

["Ben", "Joe", "Matt", "Kyle"]

Is there a way to get an array of keys that with the same order as the origin dictionary?

i.e.

["Joe", "Ben", "Kyle", "Matt"]

Upvotes: 0

Views: 129

Answers (1)

Irfan
Irfan

Reputation: 5130

Dictionaries don't have order. When we add new element to dictionary we don't now the order. You can use Array of Tuple

        let array = [("Joe", "D."), ("Ben", "K."), ("Kyle", "R.")]
        print(array)
//        [("Joe", "D."), ("Ben", "K."), ("Kyle", "R.")]
        let keys = array.map { $0.0 }
        print(keys)
//        ["Joe", "Ben", "Kyle"]

Upvotes: 2

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