apply (method)

apply

• apply<R, A>(...args): Opt<R>

• Apply (call) a function inside Some. Does nothing for None.

  Type Parameters

  • R extends any

  • A extends any[]

  Parameters

  • Rest ...args: A

    Parameters passed to wrapped function.

  Returns Opt<R>

  opt-wrapped result from the function

  Example

  const add = (a: number, b: number) => a + b;
  opt(add).apply(2, 3) // Some(5)
  none.apply(0) // None
  

  Example

  It can also be used with curried functions.

  const sub = (a: number) => (b: number) => a - b;
  opt(sub).apply(10).apply(3) // Some(7)
  

  Note

  Opt.apply is only available for functions, otherwise an exception will be thrown when called on Some.

  See

  Opt.onFunc for imperative version