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

Nephi Cosuga
Nephi Cosuga
1,907 Points
Posted by Nephi Cosuga
Nephi Cosuga
1,907 Points

What am i doing wrong??

Please help me!

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

2 Answers

Oleksii Gamalii
Oleksii Gamalii
7,157 Points
Oleksii Gamalii
Oleksii Gamalii
7,157 Points

Try changing currencies from let to var.

catongates
catongates
1,103 Points
catongates
catongates
1,103 Points

If you really want to remove the UK entry from currencies (which removeValueForKey does), currencies needs to be a variable, not an immutable constant. Declare it with var rather than let.

Alternately, instead of using removeValueForKey, maybe you just want to 

let ukCurrency = currencies["UK"]
```, which leaves currencies unmodified.