import { PagingQuery, UrlPagingQuery, SqlPagingQuery } from './internalTypes';
export declare function forEach<T>(target: Array<T>, eachFunc: (val: T, key: number) => void, inverse?: boolean): void;
export declare function forEach<T>(target: Record<string, T>, eachFunc: (val: T, key: string) => void, inverse?: boolean): void;
export declare function forEach(target: any, eachFunc: (val: any, key: any) => void, inverse?: boolean): void;
export declare const identity: <T>(r: T) => T;
export declare const clone: <T>(origin: T, old?: any) => T;
export declare const concat: <T>(target: T[], patch: T[]) => T[];
export declare const uuid: import("uuid/interfaces").v4;
export declare function dropEle<T>(ele: T, arr: T[]): T[];
export declare function capitalizeFirstLetter(str?: string | null): string | null;
/**
 * refer to https://github.com/github/fetch/blob/v2.0.4/fetch.js#L359
 * XmlHttpRequest's getAllResponseHeaders() method returns a string of response
 * headers according to the format described here:
 * http://www.w3.org/TR/XMLHttpRequest/#the-getallresponseheaders-method
 * This method parses that string into a user-friendly key/value pair object.
 */
export declare function parseHeaders(rawHeaders: string): Headers;
export declare function headers2Object(headers: Headers): Object;
export declare function pagination(count: number, page: number): {
    limit: number;
    skip: number;
};
export declare const normPagingQuery: (query?: Partial<PagingQuery>) => {
    forUrl: UrlPagingQuery;
    forSql: SqlPagingQuery;
};
export declare function isEmptyObject(obj: any): boolean;
export declare const hasMorePages: <T>(data: T[], pageSize: number, nextPage: number, curr?: {
    page: number;
    hasMore: boolean;
} | undefined) => boolean;
export declare const isNonNullable: <T>(x: T) => x is NonNullable<T>;
export declare const appendQueryString: (url: string, queryString: string) => string;
export declare const encoded: (value: {} | null) => string;
export declare const toQueryString: (query: any) => string;