declare const zipConcat: <T>(source1: T[], source2: T[]) => T[];
declare const compact: <T>(a: T[]) => T[];
declare const wrap: <T>(value: T) => [T];
declare const isNil: (a: any) => boolean;
declare const last: <T>(a: T[]) => T;

export { compact, isNil, last, wrap, zipConcat };