zip (method)

zip

• zip<U>(other): Opt<[T, U]>

• Joins two optional values to a pair. If either of them is None then the result is None.

  Type Parameters

  • U

  Parameters

  • other: Opt<U>

  Returns Opt<[T, U]>

  Example

  some(1).zip(some(true)) // Some([1, true])
  some(1).zip(none) // None
  none.zip(some(1)) // None
  none.zip(none) // None
  

  Example

  const formatAddress =
    (streetName?: string, streetNumber?: number): string =>
      opt(streetName).zip(opt(streetNumber)).map(join(' ')).orElse('');
  formatAddress('Strawberry', '12') // 'Strawberry 12'
  formatAddress('Strawberry', undefined) // ''
  formatAddress(undefined, '12') // ''
  formatAddress(undefined, undefined) // ''
  

  See

  zip