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

Posted by Robert Gunn
Robert Gunn
1,741 Points

am I not understanding the question correctly

help

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

let ukCurrency = ["UK": "Pound"]

2 Answers

krilnon
krilnon
1,458 Points

The task is to retrieve a value from the existing Dictionary (which you created in the previous step) using the key "UK". Right now, you're making a new Dictionary, not reading a value via a key from the existing Dictionary.

In the end, ukCurrency will hold the string "Pound".

Ryan Ferguson
Ryan Ferguson
4,786 Points 
let currencies = [
    "US": "Dollar",
    "UK": "Pound",
    "JP": "Yen"
]

let ukCurrency = currencies.removeValueForKey("UK")

I've got this and it's not working for me. Not sure why, exactly. Any help would be much appreciated.

krilnon
krilnon
1,458 Points

They really just want let ukCurrency = currencies["UK"].

Instead of removing the value given the key, they want you to retrieve it, which is done using the special syntax I used above.

Robert Gunn
Robert Gunn
1,741 Points

Simply the task was to capture the value of the key "UK". Thank you for the enlightenment. I sometimes make things more complicated than what they should be. Thanks again!!!

Ryan Ferguson
Ryan Ferguson
4,786 Points
Ryan Ferguson
Ryan Ferguson
4,786 Points

Gracias!