class ExtractResult {
    constructor(data) {
        this._data = data || [];

    }
    row(index) {
        return this._data[index];
    }
    column(index) {
        return [...new Array(this._data.length).keys()].map(
            i => this._data[i][index]
        );
    }
    squash() {
        return this._data.reduce((p, c) => p.concat(c), []);
    }
    get data() {
        return this._data;
    }
    toString(rowsCount) {
        let data = rowsCount > 0 ? this._data.slice(0, rowsCount) : this._data;
        return data.slice().reduce(
            (csv, lineCells) => {
                let line = lineCells.reduce(
                    (lineText, cell, idx) => {
                        cell = '"' + cell.trim().replace(/"/g, '""') + '"';
                        return lineText + cell + (idx == lineCells.length - 1 ? "" : ",")
                    }, "");
                return csv + line + "\n";
            },
            ""
        );
    }
}