import { NormalizeOptions } from '../domain/base';
import { EqualOptions, IStringHelper, IValidator } from '../application/index';
export declare class StringHelper implements IStringHelper {
    private readonly validator;
    constructor(validator: IValidator);
    toString(value: any): string;
    replace(string: string, search: string, replace: string): string;
    equal(a: string, b: string, options?: EqualOptions): boolean;
    concat(values: any[]): any;
    capitalize(str: string): string;
    initCap(str: string): string;
    isUpperCase(char: string): boolean;
    isLowerCase(char: string): boolean;
    isCharacter(char: string): boolean;
    isDigit(char: string): boolean;
    notation(source: string, type?: 'camel' | 'pascal'): string;
    /**
     * Normalize a string with utf-8 characters.
     * @param source string to normalize
     * @returns returns a lowercase string replacing extraneous characters with ascii characters between 97 to 121 or numbers
     */
    normalize(source: string, options?: NormalizeOptions): string;
    private _plural;
    private _singular;
    private _uncountable;
    private _irregular;
    /**
    * Returns the plural of an English word.
    *
    * @export
    * @param {string} word
    * @param {number} [amount]
    * @returns {string}
    */
    plural(word: string, amount?: number): string;
    /**
    * Returns the singular of an English word.
    *
    * @export
    * @param {string} word
    * @param {number} [amount]
    * @returns {string}
    */
    singular(word: string, amount?: number): string;
}
//# sourceMappingURL=string.d.ts.map