Functions
std::unique_ptr< column >	cudf::lists::reverse (lists_column_view const &input, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Reverse the element order within each list of the input column. More...

Detailed Description

Function Documentation

std::unique_ptr<column> cudf::lists::reverse	(	lists_column_view const &	input,
		rmm::cuda_stream_view	stream = `cudf::get_default_stream()`,
		rmm::mr::device_memory_resource *	mr = `rmm::mr::get_current_device_resource()`
	)

Reverse the element order within each list of the input column.

Any null input row will result in a corresponding null row in the output column.

Example:
s = [ [1, 2, 3], [], null, [4, 5, null] ]
r = reverse(s)
r is now [ [3, 2, 1], [], null, [null, 5, 4] ]

Parameters

input	Lists column for this operation
stream	CUDA stream used for device memory operations and kernel launches
mr	Device memory resource used to allocate the returned column's device memory