AsyncTransformer.indicesWhere | /mod.ts | rimbu@1.2.0

x/rimbu/mod.ts>AsyncTransformer.indicesWhere

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

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mod.ts (default module)

ArrowValuedGraphHashed

ArrowValuedGraphSorted

EdgeValuedGraphHashed

EdgeValuedGraphSorted

HashMultiMapHashValue

HashMultiMapSortedValue

HashMultiSet

HashSet

HashTableHashColumn

HashTableSortedColumn

SortedMultiMapHashValue

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SortedMultiSet

SortedSet

SortedTableHashColumn

SortedTableSortedColumn

function AsyncTransformer.indicesWhere

import { AsyncTransformer } from "https://deno.land/x/rimbu@1.2.0/mod.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

Parameters

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

a potentially async predicate function taking an element

optional

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

(optional) object specifying the following properties
negate: (default: false) when true will negate the given predicate

Returns

AsyncTransformer<T, number>