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Start your free trialNiilo Pirttijärvi
Courses Plus Student 2,354 PointsWhen do I use . and when ()?
I don't fully understand when to use dot notation and when to use braces. Could someone open their usage for me?
1 Answer
Mitch Little
11,870 PointsHi Niilo,
Generally there are different cases for dot notation and brackets.
For enums, dot notation can be used to access individual enum cases such as:
enum Compass {
case south
case east
case west
case north
}
// assigning Compass case 'south' to direction constant
let direction = Compass.south
The brackets in the case of enums are used to assign associated values to individual enum cases such as:
enum Barcode {
case upc(Int, Int, Int, Int)
case qrCode(String)
}
// using dot notation to access 'upc' case and assigning Integers to its associated value
let barCode = Barcode.upc(1, 2, 3, 4)
Remember to always check out the Swift Language Guide written by Apple. https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Enumerations.html
I hope this helps. Be sure to let me know if you have any more questions.
All the best,
Mitch