CollectionType Skipper

CollectionTypeSkipper.swift

// MARK: - CollectionType Addition
extension CollectionType {
    /**
     Create and return a new CollectionType made with only skipped items, which index is not a divider of "skip"
     
     - parameter skip: the divider index
     
     - returns: the new collectionType
     */
    func skip(skip: Int) -> [Generator.Element] {
        guard skip != 0 else { return [] }
        
        var index = self.startIndex
        var result: [Generator.Element] = []
        var i = 0
        repeat {
            if i % skip == 0 {
                result.append(self[index])
            }
            index = index.successor()
            i++
        } while (index != self.endIndex)
        
        return result
    }
}