@electric-sql/d2mini/dist/indexes.d.ts

D2Mini is a minimal implementation of Differential Dataflow for performing in-memory incremental view maintenance.

import { MultiSet } from './multiset.js';
/**
 * A map from a difference collection trace's keys -> (value, multiplicities) that changed.
 * Used in operations like join and reduce where the operation needs to
 * exploit the key-value structure of the data to run efficiently.
 */
export declare class Index<K, V> {
    #private;
    constructor();
    toString(indent?: boolean): string;
    get(key: K): [V, number][];
    entries(): MapIterator<[K, [V, number][]]>;
    keys(): MapIterator<K>;
    has(key: K): boolean;
    get size(): number;
    addValue(key: K, value: [V, number]): void;
    append(other: Index<K, V>): void;
    compact(keys?: K[]): void;
    private consolidateValues;
    join<V2>(other: Index<K, V2>): MultiSet<[K, [V, V2]]>;
}