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

Stuck in Dictionaries

I'm stuck in the test part of dictionaries. I rewatched the videos and had notes to help me remember the lecture, but i cant seem to get the answer here although i followed what the professor told me to do.

"Let's pretend a customer has ordered an ice cream. Retrieve the value for apple pie using the correct key and assign it to a constant named applePie."

Thanks in advance! :)

// Enter your code below

var iceCream = ["CC": "Chocolate Chip", "AP": "Apple Pie", "PB": "Peanut Butter"]

iceCream.updateValue("Rocky Road", forKey: "RR")

let applePie = iceCream["AP"]

2 Answers

Alphonso Sensley II
Alphonso Sensley II
Courses Plus Student 8,514 Points

Hi Ronie, I dont think youre as "stuck" as you think you are. You made it to part 3 of the challenge! good job!

Everything is right with you code except where you inserted iceCream["AP"] above the applePie constant. Was there a reason you added this?

I thought that "Retrieve the value for apple pie using the correct key" means reading the dictionary. I tried to delete the iceCream["AP"] but came out as an error. I think it was a bug on the site because i refreshed the page and tried the code without, and it worked.

Thank you so much for answering my question.

Stuart Wright
Stuart Wright
41,102 Points

You just need to delete:


Your next line is correct.

The line that you're deleting would be fine in Playground if you just want to see what the value of iceCream["AP"] is, but you would never use it in a real program, and it's what causes the following error in the code challenge:

swift_lint.swift:23:9: error: expression resolves to an unused l-value

I'll remember that! Thanks so much!