CODEWITHSUNDEEP
arraysswiftxcodedictionary
Computer Im
Computer Im

Reputation: 85

Swift: append into dictionary return random

I use this code :

AppDelegate.monthList = [Int: String]()
for index in stride(from: 1, to: 12, by: 1) {
    AppDelegate.monthList[index] = "\(index)"
}

print("iosLog MONTH: \(AppDelegate.monthList)")

And result is :

iosLog MONTH: [11: "11", 10: "10", 2: "2", 4: "4", 9: "9", 5: "5", 6: "6", 7: "7", 3: "3", 1: "1", 8: "8"]

Whay ?!

I want add respectively the keys ( like PHP or Java )

Upvotes: 0

Views: 93

Answers (1)

Ahmad F
Ahmad F

Reputation: 31645

Because Dictionary is unordered collection:

Every dictionary is an unordered collection of key-value pairs.

So, if you are aiming to get a sorted version of it, you should -logically- transform it into ordered collection, which is array. You could get:

Sorted array of AppDelegate.monthList keys:

let sortedkeys = AppDelegate.monthList.keys.sorted()
// [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]

Sorted array of AppDelegate.monthList values:

let sortedValues = AppDelegate.monthList.values.sorted()
// [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]

Or sorted array of tuples, as [(key, value)]:

let sortedTuples = AppDelegate.monthList.sorted(by: <)

for tuple in sortedTuples {
    print("\(tuple.key): \(tuple.value)")
}

Upvotes: 1

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