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

Kirill Kachinsky
Kirill Kachinsky
15,254 Points
Posted by Kirill Kachinsky
Kirill Kachinsky
15,254 Points

the request isn't resolving with the currencies constant..?

let currencies = ["US": "Dollar", "UK": "Pound", "JP": "Yen"]

let ukCurrency = currencies.removeValueForKey("UK")

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

let ukCurrency = currencies.removeValueForKey("UK")

1 Answer

Don Miller
Don Miller
1,773 Points
Don Miller
Don Miller
1,773 Points

You cannot remove a value key to a constant. Change it to var.

var currencies = ["US": "Dollar",
    "UK": "Pound",
    "JP": "Yen"]

let ukCurrency = currencies.removeValueForKey("UK")!
println(currencies)