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Extending Arrays of Arrays - Swift 4.1

Extend Arrays of Arrays

Swift 4.1, Xcode 9.3

How do I extend Array<Array> in Swift?

extension Array where Element == Array { //This is where the error occurs
    someMethod()
}

Furthermore, how would I extend an array of arrays of a specific type, for example:

extension Array where Element == Array<Int> { //Can I even do this?
    someOtherMethod()
}

Thanks in advance for your help!

Solution

  • You can extend in either way

    extension Array where Element == Int {

    func someIntegers() {

    }
}

extension Array where Element == Array<String> {

    func someStrings() {

    }
}

    and call like this anywhere,

    [0, 1, 2].someIntegers()

[["hi"]].someStrings()