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

Posted by Daniel Calleja
Daniel Calleja
Courses Plus Student 574 Points

Not sure how to solve this second part, any help? let ukCurrency = currencies(1)

Any help?

dictionaries.swift 
let currencies = [ "US": "Dollar", "UK": "Pound", "JP": "Yen"]
let ukCurrency = currencies[1]

2 Answers

Jason Edstrom
Jason Edstrom
8,976 Points

Currencies is a dictionary which uses key/value pairs. Try referencing it this way:

let ukCurrency = currencies["UK"]

In this situation, your abbreviations are your keys and the currency is the value. You can use one to reference the other in a more specific way than calling an index number like with Arrays (I.E. currencies[1]).

For example: if I have:

let  stuff = ["Things": "More Stuff"];

and I wanted to know what the value of "Things", I would do this:

let valueOfThings = stuff["Things"];

The value would of valueOfThings would be "More Stuff".

Daniel Calleja
PLUS
Daniel Calleja
Courses Plus Student 574 Points
Daniel Calleja
Daniel Calleja
Courses Plus Student 574 Points

Managed to solved it with your help!

Thanks!