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iOS Swift Collections and Control Flow Dictionaries in Swift Working With Dictionaries

Posted by luke parker
luke parker
489 Points

Having trouble retrieving a value from a dictionary

Not sure what I'm doing wrong here. Please help!

dictionary.swift 
// Enter your code below
var iceCream: [String:String] = ["CC": "Chocolate Chip", "AP": "Apple Pie", "PB": "Peanut Butter"]

iceCream.removeValue(forKey: "AP")

2 Answers

Brendan Whiting
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Brendan Whiting
Front End Web Development Techdegree Graduate 84,738 Points
Brendan Whiting
.a{fill-rule:evenodd;}techdegree seal-36
Brendan Whiting
Front End Web Development Techdegree Graduate 84,738 Points

There's an important difference between retrieving and removing. Retrieve finds the element and returns it, but the array is not affected. Remove actually changes the array eliminating that element and returns the value.

It wants you to just retrieve, which you do with [] subscripting rather than the removeValue method.

luke parker
luke parker
489 Points
luke parker
luke parker
489 Points

I see. Thanks!