How does Swift decide the order of the dictionary?

Hey Danny White,

There is no order. Dictionaries in Swift are an unordered collection type. The order in which the values will be returned cannot be determined. If you need an ordered collection of values, I recommend using an array.

If you need to iterate over a dictionary in some specific order, you can use the sort() method on its keys or values property to iterate conditionally.

Hope this helps. Good Luck!

Dictionaries use keys just like an array uses index values. If you want a value in an array, you select the corresponding index value which are ordered. In a dictionary u simply select the key to get its value. If you had an array of 100 items and say u wanted to select a value in the middle of that array you would have to count up to that point in order to select the proper index position. In a dictionary, use the value's key. To answer your question, you can put HKG last and LGA first or whatever in between. You still select its value using a key. The order is irrelevant

I have the same question: How is the order in the output for a dictionary determined? I know there are ways to get around it, however I am just curious about the logic behind the order. Why can the order not be determined? Is it just that we don't know the method it uses? But someone does know that method. Or is it that no one knows how the order is created?