findLast

Callable

• findLast<T>(xs: Traversable<T, unknown>, by: (item: T) => boolean): Maybe<T>

---

• Find the last element in a Traversable by a given predicate.

  Example

  findLast(take(counter(), 123), (i) => i > 10)
  // => 122
  
  function* foobar() {
      yield 'foo'
      yield 'bar'
  }
  findLast(foobar(), (str) => str.startsWith('bar'))
  // => "bar"
  
  findLast(take(counter(100), 100), (i) => i < 10)
  // => Nothing

  Alternatives

  • ECMAScript - findLast
  • Lodash - findLast

  ---

  Type parameters

  • T

    The element type.

  Parameters

  • xs: Traversable<T, unknown>

    The Mappable search in.

  • by: (item: T) => boolean

    The predicate to search with.

  Returns Maybe<T>

  The last element that satisfies the given predicate, Nothing otherwise.