Method or_where_le

perro_source/core/perro_csv/src/lib.rs:576–578

(self, col: &str, value: impl Into<f64>)

    }

    pub fn select(mut self, cols: &[&str]) -> Self {
        self.select_cols = Some(
            cols.iter()
                .filter_map(|col| self.table.header_index(col))
                .collect(),
        );