Strings

Modules
	Case
	Character Types
	Combining
	Searching
	Converting
	Copying
	Slicing
	Finding
	Modifying
	Replacing
	Splitting
	Extracting
	Regex

Files
file	attributes.hpp
	Read attributes of strings column.

Functions
std::unique_ptr< column >	cudf::strings::count_characters (strings_column_view const &input, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Returns a column containing character lengths of each string in the given column. More...
std::unique_ptr< column >	cudf::strings::count_bytes (strings_column_view const &input, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Returns a column containing byte lengths of each string in the given column. More...
std::unique_ptr< column >	cudf::strings::code_points (strings_column_view const &input, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::device_async_resource_ref mr=cudf::get_current_device_resource_ref())
	Creates a numeric column with code point values (integers) for each character of each string. More...

Detailed Description

Function Documentation

code_points()

std::unique_ptr<column> cudf::strings::code_points	(	strings_column_view const &	input,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Creates a numeric column with code point values (integers) for each character of each string.

A code point is the integer value representation of a character. For example, the code point value for the character 'A' in UTF-8 is 65.

The size of the output column will be the total number of characters in the strings column.

Any null string is ignored. No null entries will appear in the output column.

Parameters

input	Strings instance 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

Returns

New INT32 column with code point integer values for each character

count_bytes()

std::unique_ptr<column> cudf::strings::count_bytes	(	strings_column_view const &	input,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Returns a column containing byte lengths of each string in the given column.

The output column will have the same number of rows as the specified strings column. Each row value will be the number of bytes in the corresponding string.

Any null string will result in a null entry for that row in the output column.

Parameters

input	Strings instance 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

Returns

New column with the number of bytes for each string

count_characters()

std::unique_ptr<column> cudf::strings::count_characters	(	strings_column_view const &	input,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::device_async_resource_ref	mr = cudf::get_current_device_resource_ref()
	)

Returns a column containing character lengths of each string in the given column.

The output column will have the same number of rows as the specified strings column. Each row value will be the number of characters in the corresponding string.

Any null string will result in a null entry for that row in the output column.

Parameters

input	Strings instance 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

Returns

New column with lengths for each string