export function S4() {
  return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1)
}

export function guid() {
  return (
    S4() +
    S4() +
    '-' +
    S4() +
    '-' +
    S4() +
    '-' +
    S4() +
    '-' +
    S4() +
    S4() +
    S4()
  )
}