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iOS Enumerations and Optionals in Swift Objects and Optionals Pattern Matching With Enums

Johnny Nguyen
Johnny Nguyen
3,875 Points
Posted by Johnny Nguyen
Johnny Nguyen
3,875 Points

I don't understand the last one.

Where is ".some(let x)"?

1 Answer

Heidi Puk Hermann
Heidi Puk Hermann
33,366 Points
Heidi Puk Hermann
Heidi Puk Hermann
33,366 Points

.some comes from the definition of optionals in Swift. If you read the documentation, you will find that an optional actually is an enum with two cases; some and none, where some is the case when there is a value and none is the case when the optional is nil.

You can read more here: Apple developer documentation: optionals an here: Apple library - optionals