Method append

src/Num.ts:965–971

* Add more Pts to this Range and recalculate its min and max values. * @param pts a Group or an Iterable to append to this Range * @param update Optional. Set the parameter to `false` if you want to append without immediately updating this Range's min and max values. Default is `true`.

( pts:PtLikeIterable, update:boolean=true )

   * @param update Optional. Set the parameter to `false` if you want to append without immediately updating this Range's min and max values. Default is `true`.
   */
  append( pts:PtLikeIterable, update:boolean=true ):this {
    let _pts = Util.iterToArray( pts );
    if (_pts[0].length !== this._dims) throw new Error(`Dimensions don't match. ${this._dims} dimensions in Range and ${_pts[0].length} provided in parameter. `);
    this._source = this._source.concat( _pts ) as Group;
    if (update) this.calc();
    return this;
  }


  /**