1 | import { OptionalFindOptions } from './findoptions';
|
2 | /**
|
3 | * Returns the first element of an async-iterable sequence that matches the predicate if provided, or undefined if no such element exists.
|
4 | *
|
5 | * @export
|
6 | * @template T The type of the elements in the source sequence.
|
7 | * @param {AsyncIterable<T>} source Source async-enumerable sequence.
|
8 | * @returns {(Promise<S | undefined>)} A Promise containing the first element in the async-iterable sequence,
|
9 | * or a default value if no such element exists.
|
10 | */
|
11 | export declare function first<T>(source: AsyncIterable<T>, options?: OptionalFindOptions<T>): Promise<T | undefined>;
|