swift - split now complains about missing "isSeparator"

Question

After the latest upgrade of Swift 1.2, I can't figure out how to split a line of text into words. I used to do this:

let bits = split(value!, { $0 == " "}, maxSplit: Int.max, allowEmptySlices: false)

But that no longer works, because...

Cannot invoke 'split' with an argument list of type '(String, (_) -> _, maxSplit: Int, allowEmptySlices: Bool)'

Ummm, ok, even though I could last build? Well whatever, let's try...

let bits = split(value!, { $0 == " "})

Well that and every other version I can think of ends up saying:

Missing argument for parameter 'isSeparator' in call

Let's hear it for beta-testing new programming languages! Yay!

Anyone know the correct secret sauce for 1.2?

Answer 1

It seems that the order of the parameters changed in Swift 1.2:

let bits = split(value!, maxSplit: Int.max, allowEmptySlices: false,
                 isSeparator: { $0 == " "})

or, using the default values:

let bits = split(value!, isSeparator: { $0 == " "})

The predicate is now the last parameter and requires an external parameter name isSeparator because it is preceded by optional parameters.

The advantage of this change is that you can use the trailing closure syntax:

let bits = split(value!, maxSplit: Int.max, allowEmptySlices: false) { $0 == " " }

or

let bits = split(value!) { $0 == " " }