CODEWITHSUNDEEP
iosswift3
quantumpotato
quantumpotato

Reputation: 9767

Array.index(of: can return nil But there's compile error when checking for optional value

var countryCodes    = [String]()

let codeIndex = countriesList.index(of: countryTextField.text!)
        var chosenCountryCode? = countryCodes[codeIndex!]

that third line gives a compile error, saying it's a non-optional type. Documentation says index(of: can return nil.

How do I check for nil?

Upvotes: 0

Views: 37

Answers (1)

Laxus
Laxus

Reputation: 86

Here's how a working code for similar scenario would look like: 

var countryCodes = [String]()

countryCodes = ["1000","1001","1002","1003","1004","1005","1006","1007","1008","1009"]

let countryList = ["Afganistan", "Argentina", "Armenia","Belgium","Brunei", "Bulgaria","Cambodia","Egypt","Yemen","Zambia"]


// assuming we get this from UI:
let countryTextField_text = "Egypt"

if let codeIndex = countryList.index(of: countryTextField_text) {
    let chosenCountryCode = countryCodes[codeIndex]
    print(chosenCountryCode)
}

Will output: 1007

Upvotes: 5

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