import { IMap, PickByType, SortableTypes } from "../types/helper-types";
export declare function truncateString(input: string, maxLength?: number, suffix?: string): string;
export declare function chunks<T>(array: T[], size: number): T[][];
export declare function unique<T>(arr: T[]): T[];
export declare function uniqueBy<T>(arr: T[], selector: keyof PickByType<T, number | string, true>): T[];
export declare function sleep(ms: number): Promise<void>;
export declare function sumBy<T>(arr: T[], selector: keyof PickByType<T, number, true>): number;
export declare function minBy<T>(arr: T[], selector: keyof PickByType<T, number, true>): number;
export declare function maxBy<T>(arr: T[], selector: keyof PickByType<T, number, true>): number;
export declare function mapify<T>(arr: T[], selector: keyof PickByType<T, string | number, true>): IMap<T>;
export declare function mapifyValues(arr: string[]): IMap<boolean>;
export declare function sortBy<T>(arr: T[], selector: keyof PickByType<T, SortableTypes, true>, reverse?: boolean): T[];
export declare function sortBySelector<T>(arr: T[], selector: (x: T) => SortableTypes, reverse?: boolean): T[];
export declare function pickByIndex<T>(arr: T[], indices: number[]): T[];
export declare function hashStable(s: string): string;
export declare function camelize(s: string): string;
export declare function safePush<T>(o: IMap<T[]>, key: string, val: T): IMap<T[]>;
export declare function sortCounters(obj: IMap<number>, desc?: boolean): {
    [k: string]: number;
};
export declare function sortMapKeys<T>(obj: IMap<T>, selector: (x: T) => SortableTypes, reverse?: boolean): {
    [k: string]: T;
};
export declare function keyl(obj: unknown, falsyValue?: number): number;
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