Swift equivalent to `[NSDictionary initWithObjects: forKeys:]`

Question

Is there an equivalent for Swift\'s native Dictionary to [NSDictionary initWithObjects: forKeys:]?

Say I have two arrays with keys and valu

Answer 1

Working pure Swift solution with structs. Use zip to iterate through your two arrays as a tuple, and then create a dictionary for each key, value in the tuple.

struct SomeStruct {
    var someVal: Int?
}

var keys = [String]()
var values = [SomeStruct]()

for index in 0...5 {
    keys.append(String(index))
    values.append(SomeStruct(someVal: index))
}

var dict = [String : Any]()

for (key, value) in zip(keys, values) {
    dict[key] = value
}

print(dict) // "["4": SomeStruct(someVal: Optional(4)), "2": SomeStruct(someVal: Optional(2)), "1": SomeStruct(someVal: Optional(1)), "5": SomeStruct(someVal: Optional(5)), "0": SomeStruct(someVal: Optional(0)), "3": SomeStruct(someVal: Optional(3))]"

You could also use forEach on zip:

var dict = [String : Any]()
zip(keys, values).forEach { dict[$0.0] = $0.1 }
print(dict) // "["4": SomeStruct(someVal: Optional(4)), "2": SomeStruct(someVal: Optional(2)), "1": SomeStruct(someVal: Optional(1)), "5": SomeStruct(someVal: Optional(5)), "0": SomeStruct(someVal: Optional(0)), "3": SomeStruct(someVal: Optional(3))]\n"