How to transpose an array of strings

Question

I\'ve a txt including some data in the following format.

AYGA:GKA:GOROKA:GOROKA:PAPUA NEW GUINEA:06:04:54:S:145:23:30:E:5282
AYLA:LAE::LAE:PAPUA NEW GUINEA:0         


        

Answer 1

Perhaps more generically (and with a zip like behaviour):

extension Sequence where
    Element: Collection,
    Element.Index == Int,
    Element.IndexDistance == Int
{
    public func transposed(prefixWithMaxLength max: Int = .max) -> [[Element.Element]] {
        var o: [[Element.Element]] = []
        let n = Swift.min(max, self.min{ $0.count < $1.count }?.count ?? 0)
        o.reserveCapacity(n)
        for i in 0 ..< n {
            o.append(map{ $0[i] })
        }
        return o
    }
}

Now we can use it like so:

[0..<5, 10..<20, 100..<200]
    .map(Array.init)
    .transposed()

... which returns:

[[0, 10, 100], [1, 11, 101], [2, 12, 102], [3, 13, 103], [4, 14, 104]]