import { NameAnd } from "./nameAnd";
export declare function unique<T>(ts: T[] | undefined, tagFn: (t: T) => string): T[];
export declare function keep<K extends keyof T, T>(obj: T, ...keys: K[]): T;
export declare const chain: <From, To>(...fns: ((from: From) => To | undefined)[]) => (from: From) => To | undefined;
export declare function collect<T, T1>(t: T[], filter: (t: T) => boolean, map: (t: T) => T1): T1[];
export declare function flatten<T>(t: T[][]): T[];
export declare function flatMap<From, To>(ts: From[], fn: (from: From) => To[]): To[];
export declare function foldK<Acc, V>(vs: V[], zero: Acc, foldFn: (acc: Acc, v: V) => Promise<Acc>): Promise<Acc>;
export declare function mapK<V, To>(vs: V[], fn: (v: V) => Promise<To>): Promise<To[]>;
export declare function mapAndRecoverK<V, To>(vs: V[], fn: (v: V) => Promise<To>, recover: (v: V, e: any) => To): Promise<To[]>;
export declare function flatMapK<From, To>(ts: From[], fn: (from: From) => Promise<To[]>): Promise<To[]>;
export declare function objectSortedByKeys<T>(o: NameAnd<T>): NameAnd<T>;
export declare function objectSortedByKeysWithPriority<T>(o: NameAnd<T>, ...priorityOrder: string[]): NameAnd<T>;