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

Mitchell Parrish
Mitchell Parrish
1,092 Points
Posted by Mitchell Parrish
Mitchell Parrish
1,092 Points

dictionaries.swift challenge task 2 of 2 compiler is broken.

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

let ukCurrency = currencies.removeValueForKey("UK")

The above is the answer to their challenge but it will not compile. If i change the constant "currencies" to a variable (see below), it will work, but the challenge complains that I do not have a constant for currencies, per their challenge? What am I missing?

This example works, but is not to the challenges instructions:

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

let ukCurrency = currencies.removeValueForKey("UK")

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

let ukCurrency = currencies.removeValueForKey("UK")

1 Answer

Richard Lu
Richard Lu
20,185 Points
Richard Lu
Richard Lu
20,185 Points

Hey Mitchell,

I saw a post a few days ago as to not have the value removed, Have you tried this?

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

let ukCurrency = currencies["UK"]
Mitchell Parrish
Mitchell Parrish
1,092 Points
Mitchell Parrish
Mitchell Parrish
1,092 Points

That did it. Thank you! So much to learn! ;)

Jade Grimm
Jade Grimm
297 Points

Ha! Thank you Richard! :)