ParameterStringParser.swift

extension String {
    var urlQueryItems: [URLQueryItem]? {
        URLComponents(string: "://?\(self)")?.queryItems
    }
}

extension Array where Element == URLQueryItem {
    func value(for name: String) -> String? {
        return self.filter({$0.name == name}).first?.value
    }
    
    subscript(name: String) -> String? {
        return value(for: name)
    }
}