export declare function enumKeys<O extends object, K extends keyof O = keyof O>(obj: O): K[];
export declare function ab2str(buf: ArrayBuffer): string;
export declare function str2ab(str: string): ArrayBuffer;
export declare function getBaseLog(x: number, y: number): number;
export declare function numDigits(x: any, base?: number): number;
export declare function iter_range(begin: any, end: any, step: any): Generator<any, void, unknown>;
export declare function range(begin: any, end: any, step: any): any[];