AsyncTransformer.indicesWhere | /stream/async/async-transformer.ts | rimbu@1.2.1

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Rimbu is a TypeScript library focused on immutable, performant, and type-safe collections and other tools.

function AsyncTransformer.indicesWhere

import { AsyncTransformer } from "https://deno.land/x/rimbu@1.2.1/stream/async/async-transformer.ts";
const { indicesWhere } = AsyncTransformer;

indicesWhere<T>(pred: (value: T) => MaybePromise<boolean>, options?: { negate?: boolean | undefined; }): AsyncTransformer<T, number>

Returns an AsyncTransformer that outputs the index of each received element that satisfies the given predicate.

Type Parameters

pred: (value: T) => MaybePromise<boolean>

optional

options: { negate?: boolean | undefined; } = [UNSUPPORTED]