Swift Code Library: Printing a collection type with separators in between

Sometimes I need to create a string of values from a collection type with a certain separator in between them.

An integer array would look like this: 1, 2, 3, 4
Or this: 1 - 2 - 3 - 4

Writing an operation that does this should be as universally usable as possible. The best way is to add it to the CollectionType protocol.

This was the method I ended up using:

extension CollectionType {

    

    func descriptionWithSeparator(separator: String) -> String {

        return reduce("") { $0 == "" ? "\($1)" : $0 + separator + "\($1)" }

    }

}

It was the shortest code I could come up with, but maybe not the fastest. I have not tested for speed.

Happy coding...

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