How can I create Associative array in Swift 3

Question

Hi I am very new to Swift and am trying to use array.

I want to create an array in swift3 similar to this PHP array as below:

$countries = array(
                   "UK"=>array(
                          "gold_medal" => 59,
                          "prime_minister" => 'XYZ'
                              ),
                    "Germany"=>array(
                          "gold_medal" => 17,
                          "prime_minister" => 'abc'
                              ),
                  )

In the array above the country name are dynamic variables.

I don't know luk, If that is the best solution then why not. But I don't know how to use it. — Keyur Padalia
– Keyur Padalia, Commented Jan 2, 2017 at 18:58
you should start reading a bit about swift developer.apple.com/library/content/documentation/Swift/… — luk2302
– luk2302, Commented Jan 2, 2017 at 18:59

John Dough · Accepted Answer · 2017-01-02 20:14:10Z

11

These are called dictionaries in Swift, and you can create one like this:

let countries: [String: Any] = [
        "UK": ["gold_medal": 59, "prime_minister": "xyz"],
        "Germany": ["gold_medal": 17, "prime_minister": "abc"]
    ]

EDIT: Swift is great at inferring the variable type from the value that is being assigned, which is why we can write

let count = 5

and the compiler will figure out that count is of type Int. However, with the dictionary example above, Xcode (8.2.1) throws a warning heterogenous collection literal could only be inferred to '[String : Any]'; add explicit type annotation if this is intentional, which is why the example includes the type [String: Any].

More about dictionaries in The Swift Programming Language

edited Jan 2, 2017 at 20:14

answered Jan 2, 2017 at 19:04

John Dough

2851 silver badge7 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Artem Novichkov · Accepted Answer · 2017-01-02 18:59:13Z

5

You need to use dictionary with dictionaries as values:

let countries = ["UK": ["gold_medal" : 59,
                        "prime_minister" : "XYS"],
                 "Germany": ["gold_medal" : 17,
                        "prime_minister" : "abc"]]

answered Jan 2, 2017 at 18:59

Artem Novichkov

2,3392 gold badges26 silver badges34 bronze badges

Collectives™ on Stack Overflow

How can I create Associative array in Swift 3

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related