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

Carlos Henrique Martins
PLUS
Carlos Henrique Martins
Courses Plus Student 1,483 Points
Posted by Carlos Henrique Martins
Carlos Henrique Martins
Courses Plus Student 1,483 Points

Why is not working?

let currencies = ["US" : "Dollar","UK" : "Pound","JP" : "Yen"] let ukCurrency = currencies.removeValueForKey("UK")

This was supposed to be the right answer but it is not. Why the question is asking me to do this why the right answer should be:

var currencies = ["US" : "Dollar","UK" : "Pound","JP" : "Yen"] let ukCurrency = currencies.removeValueForKey("UK")

Because the second command it will return a value and the first one it cannot be mutable because is a constant

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

1 Answer

Shaun Kenny
PLUS
Shaun Kenny
Courses Plus Student 33,449 Points
Shaun Kenny
Shaun Kenny
Courses Plus Student 33,449 Points

Hi Carlos,

All you need to do is remove the .removeValueForKey

And then add replace [] round the "UK" key instead of Parentheses like this.

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

let ukCurrency = currencies["UK"]