Interface AsyncIterableExt<T>

Extended Asynchronous Iterable.

See

interface AsyncIterableExt<T> {
first: Promise<undefined | T>;
catch(cb: ((error: any, ctx: IErrorContext<T>) => void)): AsyncIterableExt<T>;
}

Type Parameters

T

Hierarchy

AsyncIterable<T>
- AsyncIterableExt

Index

Properties

Methods

Properties

`Readonly`first

first: Promise<undefined | T>

A getter that creates a new iterator, iterates to the first element and returns the value.

It is to simplify accessing value of single-element iterables.

Returns

first element / Promise produced by the iterable;
Promise<undefined>, if the iterable produced nothing.

Methods

catch

catch(cb): AsyncIterableExt<T>
Appends catchError operator to the end of pipeline.
Parameters
- cb: ((error: any, ctx: IErrorContext<T>) => void)
  - - (error, ctx): void
    - Parameters
      error: any
      ctx: IErrorContext<T>
      Returns void
Returns AsyncIterableExt<T>
See
Error Handling
- Defined in types/common.ts:96