method ReadableBase.prototype.find
Usage in Deno
import { ReadableBase } from "node:stream";
ReadableBase.prototype.find<T>(fn: (data: any,options?: Pick<ArrayOptions, "signal">,) => data is T,options?: ArrayOptions,): Promise<T | undefined>
This method is similar to Array.prototype.find and calls fn on each chunk in the stream
to find a chunk with a truthy value for fn. Once an fn call's awaited return value is truthy,
the stream is destroyed and the promise is fulfilled with value for which fn returned a truthy value.
If all of the fn calls on the chunks return a falsy value, the promise is fulfilled with undefined.
fn: (data: any,options?: Pick<ArrayOptions, "signal">,) => data is T
a function to call on each chunk of the stream. Async or not.
optional
options: ArrayOptions
Promise<T | undefined>
a promise evaluating to the first chunk for which fn evaluated with a truthy value,
or undefined if no element was found.
ReadableBase.prototype.find(fn: (data: any,options?: Pick<ArrayOptions, "signal">,) => boolean | Promise<boolean>,options?: ArrayOptions,): Promise<any>
fn: (data: any,options?: Pick<ArrayOptions, "signal">,) => boolean | Promise<boolean>
optional
options: ArrayOptions
Promise<any>