csv::DataFrameRow< KeyType > Class Template Reference

Proxy class that wraps a CSVRow and intercepts field access to check for edits. More...

#include <data_frame.hpp>

Public Member Functions
	DataFrameRow ()
	Default constructor (creates an unbound proxy).
	DataFrameRow (const CSVRow *_row, const std::unordered_map< std::string, std::string > *_edits, const KeyType *_key)
	Construct a DataFrameRow wrapper.
CSVField	operator[] (const std::string &col) const
	Access a field by column name, checking edits first.
CSVField	operator[] (size_t n) const
	Access a field by position (positional access never checks edits).
size_t	size () const
	Get the number of fields in the row.
bool	empty () const
	Check if the row is empty.
std::vector< std::string >	get_col_names () const
	Get column names.
const CSVRow &	get_underlying_row () const
	Get the underlying CSVRow for compatibility.
const KeyType &	get_key () const
	Get the key for this row (only valid for keyed DataFrames).
	operator std::vector< std::string > () const
	Convert to vector of strings for CSVWriter compatibility.
std::string	to_json (const std::vector< std::string > &subset={}) const
	Convert to JSON.
std::string	to_json_array (const std::vector< std::string > &subset={}) const
	Convert to JSON array.

Detailed Description

template<typename KeyType>
class csv::DataFrameRow< KeyType >

Proxy class that wraps a CSVRow and intercepts field access to check for edits.

Provides transparent access to both original and edited cell values.

Definition at line 104 of file data_frame.hpp.

Constructor & Destructor Documentation

DataFrameRow() [1/2]

template<typename KeyType >

csv::DataFrameRow< KeyType >::DataFrameRow ( )

inline

Default constructor (creates an unbound proxy).

Definition at line 107 of file data_frame.hpp.

DataFrameRow() [2/2]

template<typename KeyType >

csv::DataFrameRow< KeyType >::DataFrameRow ( const CSVRow *  _row, const std::unordered_map< std::string, std::string > *  _edits, const KeyType *  _key  )

inline

Construct a DataFrameRow wrapper.

Definition at line 110 of file data_frame.hpp.

Member Function Documentation

empty()

template<typename KeyType >

bool csv::DataFrameRow< KeyType >::empty ( ) const

inline

Check if the row is empty.

Definition at line 141 of file data_frame.hpp.

get_col_names()

template<typename KeyType >

std::vector< std::string > csv::DataFrameRow< KeyType >::get_col_names ( ) const

inline

Get column names.

Definition at line 144 of file data_frame.hpp.

get_key()

template<typename KeyType >

const KeyType & csv::DataFrameRow< KeyType >::get_key ( ) const

inline

Get the key for this row (only valid for keyed DataFrames).

Definition at line 150 of file data_frame.hpp.

get_underlying_row()

template<typename KeyType >

const CSVRow & csv::DataFrameRow< KeyType >::get_underlying_row ( ) const

inline

Get the underlying CSVRow for compatibility.

Definition at line 147 of file data_frame.hpp.

operator std::vector< std::string >()

template<typename KeyType >

csv::DataFrameRow< KeyType >::operator std::vector< std::string > ( ) const

inline

Convert to vector of strings for CSVWriter compatibility.

Definition at line 153 of file data_frame.hpp.

operator[]() [1/2]

template<typename KeyType >

CSVField csv::DataFrameRow< KeyType >::operator[] ( const std::string &  col ) const

inline

Access a field by column name, checking edits first.

Parameters

col	Column name

Returns

CSVField representing the field value (edited if present, otherwise original)

Definition at line 122 of file data_frame.hpp.

operator[]() [2/2]

template<typename KeyType >

CSVField csv::DataFrameRow< KeyType >::operator[] ( size_t  n ) const

inline

Access a field by position (positional access never checks edits).

Definition at line 133 of file data_frame.hpp.

size()

template<typename KeyType >

size_t csv::DataFrameRow< KeyType >::size ( ) const

inline

Get the number of fields in the row.

Definition at line 138 of file data_frame.hpp.

to_json()

template<typename KeyType >

std::string csv::DataFrameRow< KeyType >::to_json ( const std::vector< std::string > &  subset = {} ) const

inline

Convert to JSON.

Definition at line 174 of file data_frame.hpp.

to_json_array()

template<typename KeyType >

std::string csv::DataFrameRow< KeyType >::to_json_array ( const std::vector< std::string > &  subset = {} ) const

inline

Convert to JSON array.

Definition at line 179 of file data_frame.hpp.

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The documentation for this class was generated from the following file:

• include/internal/data_frame.hpp