HashMapCollisionBuilder | /hashed/map-custom/index.ts | rimbu@1.2.0

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

method HashMapCollisionBuilder.prototype.modifyAt

import { HashMapCollisionBuilder } from "https://deno.land/x/rimbu@1.2.0/hashed/map-custom/index.ts";

modifyAt(atKey: K, options: { ifNew?: OptLazyOr<V, Token>; ifExists?: ((currentEntry: V, remove: Token) => V | Token) | V; }): boolean

Parameters

atKey: K

options: { ifNew?: OptLazyOr<V, Token>; ifExists?: ((currentEntry: V, remove: Token) => V | Token) | V; }

boolean