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

Posted by Neil Nathan
Neil Nathan
1,113 Points

there appears to be an issue with the requirement to make currencies a constant as it is not possible to modify it .....

by creating the second constant ukCurrency to return the key pair value for "UK"

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

let ukCurrency = currencies.removeValueForKey("UK")

a mutability error is thrown

1 Answer

Joseph Kato
Joseph Kato
35,340 Points
Joseph Kato
Joseph Kato
35,340 Points

Hi Neil,

I think the issue is that you're not actually being asked to remove UK's value; you just need to assign it to a another constant.

For instance:

let ukCurrency = currencies["UK"]