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iOS Swift 2.0 Collections and Control Flow Dictionaries Working with Dictionaries

Mahmoud Rajabzadeh-Mashhadi
Mahmoud Rajabzadeh-Mashhadi
489 Points
Posted by Mahmoud Rajabzadeh-Mashhadi
Mahmoud Rajabzadeh-Mashhadi
489 Points

Dictionary

Not sure how the last part works. I just don't understand what the quiz is asking for.

Thanks.

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

1 Answer

jonlunsford
jonlunsford
15,472 Points
jonlunsford
jonlunsford
15,472 Points

Mahmoud: Here is the progression.

  1. Create a dictionary and assign it to a variable iceCream - looks like you've done this.
  2. Add the key: value pair ("RR", "Rocky Road"). To do this you need to use the variable iceCream created in step 1 and call the .updateValue method like this.
iceCream.updateValue("Rocky Road" forKey: "RR")

Next, retrieve the value of apple pie using the following syntax and add it to a constant.

let applePie = iceCream["AP"]

The final step is to change or update the value for the key "CC", using the same method as in step 2 above.

iceCream.updateValue("Chocolate Chip Cookie Dough" forKey: "CC")