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iOS

Posted by Max Lettenberger
Max Lettenberger
2,017 Points

Tuples: Struggling w/ dictionaries

I have no idea how to make a dictionary with more than key value pairs (vs. a key picking out more than one value). How do you [make?] one that can contain keys which pick out three other values, such as "PM" picking out "The Beatles", "Magical Mystery Tour" and "The Fool on the Hill"?

I don't even know where to begin.

Please help!

1 Answer

Michael Hulet
Michael Hulet
47,913 Points

On its own, a single key must only reference a single value. In other words, you can't do exactly what you want to do, in this case. However a simple way around this restriction is to have the key correspond to an array, holding all the values you want. Using the examples in your question, a solution might look like this:

//You have a great taste in music, by the way
let dictionary = ["PM":["The Beatles", "Magical Mystery Tour", "The Fool on the Hill"]]
//You would reference the object you want like below. The next line will cause the constant "bandName" to equal "The Beatles"
let bandName = dictionary["PM"][0]
Max Lettenberger
Max Lettenberger
2,017 Points

Thank you very much, Michael! Great to see that you appreciate the music choice, too.