import type { reduceFn } from './_types';
/**
 * Produces accumulating values.
 * @param x an array (updated)
 * @param fr reduce function (acc, v, i, x)
 * @param acc initial value
 * @returns x
 */
declare function accumulate$<T>(x: T[], fr: reduceFn<T, T>, acc?: T): T[];
export default accumulate$;
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