/**
 * Capitalizes the first character of a given string after trimming whitespace.
 *
 * @param {string} str - The input string to capitalize.
 *
 * @returns {string} The input string with the first character capitalized.
 */
export declare const capitalize: (str: string) => string;
/**
 * Creates an array of a specified length, where each element is its index.
 *
 * @param {number} length - The desired length of the array. Defaults to 0.
 *
 * @returns {number[]} An array of indexes from 0 to `length - 1`.
 */
export declare const rangeArray: (length?: number) => number[];
/**
 * Creates an array of strings of a specified length, using a provided string generator function.
 *
 * @param {number} length - The desired length of the array.
 * @param {() => string} makeString - A function that generates a string for each element.
 *
 * @returns {string[]} An array of strings of the specified length.
 */
export declare const fillArrayWith: (length: number, makeString: () => string) => string[];
declare const _default: {
    capitalize: (str: string) => string;
    rangeArray: (length?: number) => number[];
    fillArrayWith: (length: number, makeString: () => string) => string[];
};
export default _default;