import type { Arr } from '@toolbox-ts/types/defs/array';
export interface NormalizeArrayOptions {
    deduplicate?: boolean;
}
export interface NormalizeSentenceOptions {
    capitalizeFirst?: boolean;
    endPunctuation?: string;
}
/**
 * Cleans an array of strings:
 * - Trims whitespace from each string.
 * - Filters out empty strings and non-string values.
 * - Returns an empty array if the input is undefined or empty.
 * - Optionally deduplicates the array.
 * @example
 * ```ts
 * normalize.array([' foo ', 'bar', '', 123, null, undefined, 'baz '])
 * // ['foo', 'bar', 'baz']
 * normalize.array(undefined) // []
 * normalize.array([]) // []
 * normalize.array(['a', 'b', 'a'], true) // ['a', 'b']
 * ```
 */
export declare const array: <A extends Arr = unknown[]>(a?: unknown, { deduplicate }?: NormalizeArrayOptions) => (A[number] & string)[];
/**
 * Normalizes a string into a well-formed sentence:
 * - Trims whitespace from the string.
 * - Capitalizes the first letter (optional, default: true).
 * - Ensures the string ends with proper punctuation (optional, default: '.').
 * - Returns an empty string if the input is not a valid string.
 * @example
 * ```ts
 * normalize.sentence(' hello world ') // 'Hello world.'
 * normalize.sentence('hello world', { endPunctuation: '!' }) // 'Hello world!'
 * normalize.sentence('Hello world.') // 'Hello world.'
 * ```
 */
export declare const sentence: (str: unknown, { capitalizeFirst, endPunctuation }?: {
    capitalizeFirst?: boolean | undefined;
    endPunctuation?: string | undefined;
}) => string;