Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

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

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

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

Ha! Thank you Richard! :)