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

Posted by Robert Kwiat
Robert Kwiat
5,349 Points

Problems with Swift Dictionaries

Hi, I am having problems solving this code challenge.

Directions Assign the value for key "UK" to the constant "ukCurrency"

Code

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

let ukCurrency = currencies.removeValueForKey("UK")

1 Answer

Jeremy Tobias
Jeremy Tobias
7,572 Points

You can simply just reference the key like so: 

let ukCurrency = currencies["UK"]

It will look in the currencies array and give the value for the one you specified UK.

Values in a dictionary can be removed using the removeValueForKey method only if the dictionary is defined with the var keyword. Since currencies is defined as a constant that wont work.