lengthIn (method)

Abstract lengthIn

• lengthIn<R>(this): R

• Returns the length of a string or array wrapped in an Opt.

  Type Parameters

  • R extends Opt<number>

  Parameters

  • this: Opt<string | readonly unknown[]>

  Returns R

  Example

  opt('hello').lengthIn() // Some(5)
  opt([1, 2, 3]).lengthIn() // Some(3)
  opt('').lengthIn() // Some(0)
  opt([]).lengthIn() // Some(0)
  none.lengthIn() // None