/// <reference types="lodash" />
import * as _ from 'lodash';
export declare function isTrueProperty(val: any): boolean;
export declare function isPresent(val: any): boolean;
export declare function flattenObject(obj: any): _.Dictionary<{}>;
export declare function unFlattenObject(params: any): {};
export declare function dateFormat(date: Date | number, format?: string): string;
export declare function numberFormat(num: number | string): string;
export declare function currencyFormat(num: number, prefix?: string): string;
export declare enum DateType {
    Day = 0,
    Week = 1,
    Month = 3,
    Year = 2,
}
export declare function getFirstDateOfWeek(date: Date): Date;
export declare function getLastDateOfWeek(date: Date): Date;
export declare function getLastDateOfMonth(date: Date): Date;
export declare function addDate(date: Date, offset: number, dateType: DateType): Date;
export declare function leapYear(year: any): boolean;
export declare function division(dividend: number, divisor: number, toFixed?: number): number;
export declare function guid(): string;