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iOS Generics in Swift Generic Functions, Parameters and Constraints Generic Functions

Posted by connor hoare
connor hoare
7,933 Points

What is going on here?

I don't know why this is not compiling I have tried but it is not even compiling

func duplicate<T>(_ item: T, numberOfTimes: Int) -> [T] {

}

This is how I think it is but I don't know why it is not compiling

generics.swift 
func duplicate<T>(_ item: T, _ numberOfTimes: Int) -> [ T ] {


}

1 Answer

Sahil Gangele
Sahil Gangele
6,851 Points
Sahil Gangele
Sahil Gangele
6,851 Points

Going by the code you've given, this won't compile. The reason is that you declared your function to return a [T]. But, your function body is empty AKA no return statement. So you've gone against your declaration.

In your function body just put return [item] That should help you temporarily compile it.