import { Selector, Predicate, ParsingOptions, FieldDescription, PrimitiveType, TableDto, DataTypeName, ScalarType } from './types';
import { JSONParser } from './utils';
export declare class DataPipe {
    private data;
    constructor(data?: any[]);
    fromCsv(content: string, options?: ParsingOptions): DataPipe;
    parseCsv(content: string, options?: ParsingOptions): DataPipe;
    /**
     * Loads dataPipe with Table information
     * @param rowsOrTable a datarows with 2 dimentional arrays or entire table. If you provide rows, then you have to specify fieldNames
     * @param fieldNames fieldNames what correspond to the rows
     * @param fieldDataTypes  fieldNames what correspond to the rows
     */
    fromTable(rowsOrTable: PrimitiveType[][] | TableDto, fieldNames?: string[], fieldDataTypes?: DataTypeName[]): DataPipe;
    /**
     * Get pipes currrent array data.
     */
    toArray(): any[];
    /**
     * Outputs Pipe value as CSV content
     * @param delimiter
     */
    toCsv(delimiter?: string): string;
    /**
     * Outputs pipe value as JavaScript object.
     * @param keyField a key selector represented as a string (field name) or array of stringa (fieldNames) or custom selectors
     */
    toObject(keyField: string | string[] | Selector<any, string>): Record<string, any>;
    /**
     * Convert array of items to into series array or series record.
     * @param propertyName optional parameter to define a property to be unpacked.
     * If it is string the array with values will be returned, otherwise an object with a list of series map
     */
    toSeries(propertyName?: string | string[]): Record<string, ScalarType[]> | ScalarType[];
    /**
     * Gets table data from JSON type array.
     */
    toTable(): TableDto;
    /**
     * This method allows you to examine a state of the data during pipe execution.
     * @param dataFunc
     */
    tap(dataFunc: (d: any[]) => void): DataPipe;
    /**
     * Sum of items in array.
     * @param elementSelector Function invoked per iteration.
     * @example
     * dataPipe([1, 2, 5]).sum(); // 8
     *
     * dataPipe([{ val: 1 }, { val: 5 }]).sum(i => i.val); // 6
     */
    sum(elementSelector?: Selector): number | null;
    /**
     * Average of array items.
     * @param elementSelector Function invoked per iteration.
     * @example
     * dataPipe([1, 5, 3]).avg(); // 3
     */
    avg(elementSelector?: Selector): number | null;
    average: (elementSelector?: Selector<any, any> | undefined) => number | null;
    /**
     * Count of elements in array.
     * @param predicate Predicate function invoked per iteration.
     */
    count(predicate?: Predicate): number | null;
    /**
     * Computes the minimum value of array.
     * @param elementSelector Function invoked per iteration.
     */
    min(elementSelector?: Selector): number | Date | null;
    /**
     * Computes the maximum value of array.
     * @param elementSelector Function invoked per iteration.
     */
    max(elementSelector?: Selector): number | Date | null;
    /**
     * Gets first item in array satisfies predicate.
     * @param predicate Predicate function invoked per iteration.
     */
    first(predicate?: Predicate): any | undefined;
    /**
     * Gets last item in array satisfies predicate.
     * @param array The array to process.
     * @param predicate Predicate function invoked per iteration.
     */
    last(predicate?: Predicate): any | undefined;
    /**
     * Get mean.
     * @param field Property name or Selector function invoked per iteration.
     */
    mean(field?: Selector | string): number | null;
    /**
     * Get quantile of a sorted array.
     * @param field Property name or Selector function invoked per iteration.
     * @param p quantile.
     */
    quantile(p: number, field?: Selector | string): number | null;
    /**
     * Get variance.
     * @param field Property name or Selector function invoked per iteration.
     */
    variance(field?: Selector | string): number | null;
    /**
     * Get the standard deviation.
     * @param field Property name or Selector function invoked per iteration.
     */
    stdev(field?: Selector | string): number | null;
    /**
     * Get median.
     * @param field Property name or Selector function invoked per iteration.
     */
    median(field?: Selector | string): number | null;
    /**
     * Groups array items based on elementSelector function
     * @param elementSelector Function invoked per iteration.
     */
    groupBy(elementSelector: Selector): DataPipe;
    /**
     * Joins two arrays together by selecting elements that have matching values in both arrays
     * @param rightArray array of elements to join
     * @param leftKey left Key
     * @param rightKey
     * @param resultSelector
     */
    innerJoin(rightArray: any[], leftKey: string | string[] | Selector<any, string>, rightKey: string | string[] | Selector<any, string>, resultSelector: (leftItem: any, rightItem: any) => any): DataPipe;
    leftJoin(rightArray: any[], leftKey: string | string[] | Selector<any, string>, rightKey: string | string[] | Selector<any, string>, resultSelector: (leftItem: any, rightItem: any) => any): DataPipe;
    fullJoin(rightArray: any[], leftKey: string | string[] | Selector<any, string>, rightKey: string | string[] | Selector<any, string>, resultSelector: (leftItem: any, rightItem: any) => any): DataPipe;
    /**
     * Select data from array item.
     * @param elementSelector Function invoked per iteration.
     * @example
     *
     * dataPipe([{ val: 1 }, { val: 5 }]).select(i => i.val).toArray(); // [1, 5]
     */
    select(elementSelector: Selector): DataPipe;
    map: (elementSelector: Selector) => DataPipe;
    merge(sourceArray: any[], targetKey: string | string[] | Selector<any, string>, sourceKey: string | string[] | Selector<any, string>): DataPipe;
    flattenObject(): any;
    unflattenObject(): any;
    flatten(): any;
    pivot(rowFields: string | string[], columnField: string, dataField: string, aggFunction?: (array: any[]) => any | null, columnValues?: string[]): DataPipe;
    transpose(): DataPipe;
    /**
     * Filters array of items.
     * @param predicate Predicate function invoked per iteration.
     */
    where(predicate: Predicate): DataPipe;
    filter: (predicate: Predicate) => DataPipe;
    /**
     * Get unique values
     * @param elementSelector Function invoked per iteration.
     */
    unique(elementSelector?: Selector): DataPipe;
    distinct: (elementSelector?: Selector<any, any> | undefined) => DataPipe;
    /**
     * Sort array.
     * @param fields sorts order.
     * @example
     * dp.sort('name ASC', 'age DESC');
     */
    sort(...fields: string[]): DataPipe;
    /**
     * generates a field descriptions (first level only) that can be used for relational table definition.
     * if any properties are Objects, it would use JSON.stringify to calculate maxSize field.
     */
    getFieldsInfo(): FieldDescription[];
    JSONParser(): JSONParser;
}
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