pub fn apply_array_prepend(
columns: &mut [Column],
) -> PolarsResult<Option<Column>>Expand description
Prepend element to start of each list (PySpark array_prepend).
pub fn apply_array_prepend(
columns: &mut [Column],
) -> PolarsResult<Option<Column>>Prepend element to start of each list (PySpark array_prepend).