New Post: Allow toArray() method to return indexed columns

    /**
     * Create array from worksheet
     *
     * @param mixed $nullValue Value returned in the array entry if a cell doesn't exist
     * @param boolean $calculateFormulas Should formulas be calculated?
     * @param boolean $formatData  Should formatting be applied to cell values?
     * @param boolean $returnCellRef False - Return a simple array of rows and columns indexed by number counting from zero
     *                               True - Return rows and columns indexed by their actual row and column IDs
     * @return array
     */
    public function toArray($nullValue = null, $calculateFormulas = true, $formatData = true, $returnCellRef = false) {