Scala URL query string builder and parser

import java.net.{URLDecoder, URLEncoder}
import java.nio.charset.StandardCharsets.UTF_8

def encodeQuery(params: Seq[(String, String)]): String =
  params.map { (key, value) =>
    s"${URLEncoder.encode(key, UTF_8)}=${URLEncoder.encode(value, UTF_8)}"
  }.mkString("&")

def parseQuery(query: String): Vector[(String, String)] =
  query.split("&").iterator.filter(_.nonEmpty).map { pair =>
    pair.split("=", 2) match
      case Array(key, value) => URLDecoder.decode(key, UTF_8) -> URLDecoder.decode(value, UTF_8)
      case Array(key) => URLDecoder.decode(key, UTF_8) -> ""
  }.toVector