import { Pred } from './_types';
/**
 * Filter the elements of an array that meet the condition specified in a callback function.
 * @param array The array to filter.
 * @param fn the callback function.
 * @signature
 *    P.filter(array, fn)
 * @signature
 *    P.filter(fn)(array)
 * @example
 *    P.filter([1, 2, 3], x => x % 2 === 1) // => [1, 3]
 *
 *    P.pipe([1, 2, 3], P.filter(x => x % 2 === 1)) // => [1, 3]
 * @category Array, Pipe
 */
export declare function partition<T, S extends T>(array: readonly T[], fn: (value: T) => value is S): [S[], Exclude<T, S>[]];
export declare function partition<T>(array: readonly T[], fn: Pred<T, boolean>): T[];
export declare function partition<T, S extends T>(fn: (input: T) => input is S): (array: readonly T[]) => [S[], Exclude<T, S>[]];
export declare function partition<T>(fn: Pred<T, boolean>): (array: readonly T[]) => [T[], T[]];
export declare type PredIndexed<T, K> = (input: T, index: number, array: readonly T[]) => K;
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