Swift append an array when it's been declared as Any

Question

I'm learning Swift and I have a following problem: I create a dictionary containing some data, one of which is stored as an array. I want make an operation on this array to add some info. Currently I have managed to achieve this by writing this code:

var myDictionary = [String: Any]()

myDictionary = [
    "name": "Wiktor",
    "age": 25,
    "scores": [1, 2, 3, 4, 5, 6],
]

var l = myDictionary["scores"] as? [Int] ?? [Int]()
l.append(100)
myDictionary["scores"] = l
print("\(myDictionary["scores"]!)")

This works, meaning an array with value 100 is printed out, but this solution seems a little bit over engineered to me. Can I do it easier, more like:

myDictionary["scores"].append(100)

in python?

Can you provide more context? Where does the dictionary come from? Why do you use a dictionary instead of a custom type? — Martin R
– Martin R, Commented Nov 4, 2018 at 18:47
It's only for educational purpose. I'm going through Apple's tutorial and wanted to understand better how arrays and dictionaries work, so I've come up with this example. — gonczor
– gonczor, Commented Nov 4, 2018 at 18:50

Mattia C. · Accepted Answer · 2018-11-07 16:32:06Z

1

Since myDictionary values are declared as Any, you could have anything (or even nothing) assigned at "scores", so you need to safe-cast the value in to a variable first and then reassign it.

I don't know about Python, but Swift doesn't check dictionary values at compile time.

answered Nov 7, 2018 at 16:32

Mattia C.

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