nikriek

extension Array {
    /// GroupBy that puts each element into a group of similiar elements denoted by an Equatable attribute, complexity: O(n)
    func reduce<G: Equatable>(by key: (Element) -> (G)) -> [G: [Element]] {
        return reduce([:], { (result, element) in
            var groups = result
            let group = key(element)
                            
            if let existingGroupElements = groups[group] {
                groups[group] = existingGroupElements + [element]
            } else {

nikriek

Keybase proof

I hereby claim:

• I am nikriek on github.
• I am nikriek (https://keybase.io/nikriek) on keybase.
• I have a public key ASB1XtC9LqK7VEbMHJum0gFDe6D0qEIPGNDNwldvN3jcXAo

To claim this, I am signing this object: