export declare function range(start: number, end: number, step?: number): number[];
export declare function arrayGrouped<A>(array: A[], groupSize: number): A[][];
export declare function consensus<A>(array: Array<A | undefined>, comparer: (a: A | undefined, b: A | undefined) => number): A | undefined;
export declare function partition<A>(array: A[], f: (item: A) => boolean): [A[], A[]];
export declare function flatten<A>(array: A[][]): A[];
export declare function flatMap<A, B>(array: A[], f: (a: A) => B[]): B[];
export declare function groupBy<A>(array: A[], grouper: (a: A) => string): {
    [key: string]: A[];
};