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

Ramsey Shafi
PLUS
Ramsey Shafi
Courses Plus Student 5,240 Points
Posted by Ramsey Shafi
Ramsey Shafi
Courses Plus Student 5,240 Points

I don't understand what the mistake is

I don't understand what is wrong with this code. Everything looks fine to me.

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

2 Answers

Chris Shaw
Chris Shaw
26,676 Points
Chris Shaw
Chris Shaw
26,676 Points

Hi Ramsey,

This challenge doesn't want you to alter the dictionary in any way, it simply wants you to assign the value for the key UK to a new constant called ukCurrency.

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

Happy coding!

Ramsey Shafi
Ramsey Shafi
Courses Plus Student 5,240 Points
Ramsey Shafi
Ramsey Shafi
Courses Plus Student 5,240 Points

Thank you so much! I was trying to figure this out for so long.

Tyler Zika
Tyler Zika
14,402 Points
Tyler Zika
Tyler Zika
14,402 Points

currencies is a constant. Since that is the case, you cannot remove something from a dictionary by the key. Make currencies a variable by using 

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