pub fn peek(&self) -> Option<(&'a str, Value<'a>)> {
        if self.row_idx >= self.dset.n_rows() {
            return None;
        }
        let value = self.dset.item(self.row_idx, self.col_idx);
        let name = self.dset.col_name(self.col_idx);
        Some((name, value))
    }
/// get value without advancing the iterator
get value without advancing the iterator
get value without advancing the iterator
pub fn peek(&self) -> Option<(&'a str, Value<'a>)> {
        if self.row_idx >= self.dset.n_rows() {
            return None;
        }
        let value = self.dset.item(self.row_idx, self.col_idx);
        let name = self.dset.col_name(self.col_idx);
        Some((name, value))
    }
pub fn peek ( & self ) -> Option < ( & ' a str , Value < ' a > ) > { if self . row_idx >= self . dset . n_rows ( ) { return None ; } let value = self . dset . item ( self . row_idx , self . col_idx ) ; let name = self . dset . col_name ( self . col_idx ) ; Some ( ( name , value ) ) }
get value without advancing the iterator
get value without advancing the iterator
&self
&self