import { mathArgument, maybeNumber, cellValue, cellValueArray } from "../types";
export declare const ERRORS: {
    null: string;
    div0: string;
    value: string;
    ref: string;
    name: string;
    num: string;
    na: string;
    data: string;
};
export declare function dayOfTheYear(date: Date): number;
export declare function getJsDateFromExcel(excelDate: number): Date;
export declare function getExcelDateFromJs(jsDate: Date): number;
export declare function _to_number(v: string | number | boolean): maybeNumber;
export declare function _combine(data: mathArgument[]): cellValue[];
export declare function _isEmpty(text: cellValue): boolean;
export declare function boolean2str(bool: boolean): string;
export declare function val2boolean(val: string | number | boolean): boolean;
export declare function _to_date(d: cellValue): Date;
export declare function numberOrError(v: cellValue): number;
export declare function convertToNotation(num: cellValue, places: cellValue, left: number, right: number, notation: number): string;
export declare function sortArray(arr: cellValue[][], configs: Array<{
    index: number;
    dir: number;
}>): cellValue[][];
export declare function transposeArray(arr: cellValue[][]): cellValue[][];
export declare function dataToArr2D(data: cellValueArray): cellValue[][];
export declare function arr2DtoData(arr: cellValue[][], width: number, height: number): cellValueArray;
export declare function toRow(array: cellValueArray, ignore?: number, scan_by_column?: number): cellValue[];