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iOS Swift Basics (retired) Collections What is a Dictionary?

Posted by Bradford Jackson
Bradford Jackson
313 Points

What am I doing wrong in my code?

it's asking me to let ukCurrency equal the value for my key pair "UK", so I write " let ukCurrency = ["UK"] " and it errors out =(

2 Answers

Andres Oliva
Andres Oliva
7,810 Points
Andres Oliva
Andres Oliva
7,810 Points

The correct syntax is

let ukCurrency = currencies["UK"]

You need to specify where the key comes from (the dictionary). You can imagine that if you had several dictionaries, nobody would know what dictionary you're trying to get data from. (If you don't specify it)

Eddie Fuentes
Eddie Fuentes
Courses Plus Student 310 Points

Thank you, This was very helpful. I was really stuck in this challenge.

Cody Coats
Cody Coats
7,469 Points
Cody Coats
Cody Coats
7,469 Points

Pulled the following from the Swift book by apple. It is a variable not a constant though. Should get you on track to the correct answer.

var airports: [String: String] = ["YYZ": "Toronto Pearson", "DUB": "Dublin"]