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Jacob Tucker512 Points
why doesnt the following statement work let ukCurrency = currencies.removeValueForKey ("UK")
assuming first line is correct which it is
Stone Preston42,016 Points
you misinterpreted what the task is asking you to do.
task 2 states: Assign the value for key "UK" to a constant named ukCurrency.
you dont remove the value assigned to the key "UK", you assign the value of that key to a new constant, whilst keeping the dictionary the same (you dont want to remove any keys/values or anything like that)
the swift eBook states:
You access and modify a dictionary through its methods and properties, or by using subscript syntax
subscript syntax consists of the name of the dictionary followed by a pair of square brackets with the key inside:
the above code returns the value for the key "someKey" in the dictionary named someDictionary
so to assign the value for the key "UK" to a constant named ukCurrency you would use
let currencies = [ "US": "Dollar", "UK": "Pound", "JP": "Yen"] let ukCurrency = currencies["UK"] // ukCurrency now has a value of "Pound"