export declare function groupBy<T, I>(array: T[], selectId: (t: T) => I): Map<I, T[]>;
export declare function compareByComparators<T, U>(comparators: Array<(a: T, b: U) => number>, t: T, u: U): 0 | 1 | -1;
export declare function compareByIteratees<T, I>(iteratees: Array<(a: T) => I>, itemA: T, itemB: T): 0 | 1 | -1;
export declare function anyIntersectionSorted<T, U>(as: T[], bs: U[], comparator: (a: T, b: U) => number): boolean;
export declare function uniqSorted<T>(array: T[], comparators: Array<(a: T, b: T) => number>): T[];
export declare function updateOneSorted<T, U>(items: T[], item: U, tComparator: (a: T, b: U) => number, merger: (existingItem: T, newItem: U) => T, idx?: number | undefined): {
    idx: number;
    items: T[];
};
export declare function upsertOneSorted<T, U>(items: T[], item: U, tComparator: (a: T, b: U) => number, merger: (existingItem: T, newItem: U) => T, transform: (u: U, idx: number) => T, idx?: number | undefined): {
    idx: number;
    items: T[];
};
export declare function removeOneSorted<T, U>(items: T[], u: U, tComparator: (a: T, u: U) => number, idx?: number | undefined): {
    idx: number;
    removedItem: T | undefined;
    items: T[];
};
export declare function removeManySorted<T, U>(items: T[], us: U[], tComparator: (a: T, u: U) => number, currIndex?: number): {
    items: T[];
    removedItems: T[];
    idx: number;
};
export declare function findSorted<T, B>(items: T[], item: B, tComparator: (a: T, b: B) => number, currIndex?: number): {
    idx: number;
    item: T;
} | {
    idx: number;
    item: undefined;
};