firstMap.swift

import Cocoa

extension Collection {
    func firstMap<T>(_ transform: @escaping (Element) -> T?) -> T? {
        for element in self {
            if let transformed = transform(element) {
                return transformed
            }
        }
        return nil
    }
}


let values = ["a", "b", "3"]

let result = values.firstMap { string in
    return Int(string)
}

print(result) // Optional(3)