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Module

x/rimbu/ordered/map-custom/implementation/empty.ts>OrderedMapEmpty#modifyAt

Rimbu is a TypeScript library focused on immutable, performant, and type-safe collections and other tools.
rimbu-org/rimbu
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method OrderedMapEmpty.prototype.modifyAt
import { OrderedMapEmpty } from "https://deno.land/x/rimbu@0.13.1/ordered/map-custom/implementation/empty.ts";

Parameters

key: K
options: { ifNew?: OptLazyOr<V, Token>; }

Returns

WithKeyValue<Tp, K, V>["normal"]