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import { Table } from '../table';
import { Vector } from '../vector';
import { Predicate, Col } from './predicate';
import { RecordBatch } from '../recordbatch';
import { VectorType as V } from '../interfaces';
import { DataType, Int, Struct } from '../type';
/** @ignore */
export declare type BindFunc = (batch: RecordBatch) => void;
/** @ignore */
export declare type NextFunc = (idx: number, batch: RecordBatch) => void;
export declare class DataFrame<T extends {
[key: string]: DataType;
} = any> extends Table<T> {
filter(predicate: Predicate): FilteredDataFrame<T>;
scan(next: NextFunc, bind?: BindFunc): void;
scanReverse(next: NextFunc, bind?: BindFunc): void;
countBy(name: Col | string): CountByResult<any, Int<import("../enum").Type.Int | import("../enum").Type.Int8 | import("../enum").Type.Int16 | import("../enum").Type.Int32 | import("../enum").Type.Int64 | import("../enum").Type.Uint8 | import("../enum").Type.Uint16 | import("../enum").Type.Uint32 | import("../enum").Type.Uint64>>;
}
/** @ignore */
export declare class CountByResult<T extends DataType = any, TCount extends Int = Int> extends Table<{
values: T;
counts: TCount;
}> {
constructor(values: Vector<T>, counts: V<TCount>);
toJSON(): Object;
}
/** @ignore */
export declare class FilteredDataFrame<T extends {
[key: string]: DataType;
} = any> extends DataFrame<T> {
private _predicate;
constructor(batches: RecordBatch<T>[], predicate: Predicate);
scan(next: NextFunc, bind?: BindFunc): void;
scanReverse(next: NextFunc, bind?: BindFunc): void;
count(): number;
[Symbol.iterator](): IterableIterator<Struct<T>['TValue']>;
filter(predicate: Predicate): FilteredDataFrame<T>;
countBy(name: Col | string): CountByResult<any, Int<import("../enum").Type.Int | import("../enum").Type.Int8 | import("../enum").Type.Int16 | import("../enum").Type.Int32 | import("../enum").Type.Int64 | import("../enum").Type.Uint8 | import("../enum").Type.Uint16 | import("../enum").Type.Uint32 | import("../enum").Type.Uint64>>;
}
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