export declare function atonic(s: string): string;
export declare function isLetter(s: string): boolean;
export declare function isUpper(s: string): boolean;
export declare function isLower(s: string): boolean;
export declare function isDigit(s: string): boolean;
export declare function isLetterOrDigit(s: string): boolean;
export declare function isPunctuation(s: string): boolean;
export declare function isSentenceStartingWord(index: number, text: string): boolean;
export declare function defaults(target: any, source: any): any;
export declare function pick(obj: any, props: string[]): any;
export declare function uniq<T>(items: T[]): T[];