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iOS Swift Basics (retired) Collections Modifying an Array

Error in exercise, can't solve it by myself

Where is the mistake?

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

arrays.swift
var todo = ["Learn Swift", "Build App", "Deploy App"]

2 Answers

J.D. Sandifer
J.D. Sandifer
18,813 Points

Because the exercise had us define the dictionary as a constant - with let - it can't be changed with .removeValueForKey(). Besides, the exercise doesn't ask you to remove the value anyway. (Although you are correct that it would have returned the value and so the variable would have been assigned the right value. Bonus point for remembering that!)

You just want to assign the value:

let ukCurrency = currencies["UK"]

Thank You very much!!!!