自学教程：C++ Column函数代码示例

DataFrameJoinVisitors::DataFrameJoinVisitors(const DataFrame& left_, const DataFrame& right_, const SymbolVector& names_left, const SymbolVector& names_right, bool warn_, bool na_match) :  left(left_), right(right_),  visitor_names_left(names_left),  visitor_names_right(names_right),  visitors(names_left.size()),  warn(warn_){  IntegerVector indices_left  = names_left.match_in_table(RCPP_GET_NAMES(left));  IntegerVector indices_right = names_right.match_in_table(RCPP_GET_NAMES(right));  const int nvisitors = indices_left.size();  if (indices_right.size() != nvisitors) {    stop("Different size of join column index vectors");  }  for (int i = 0; i < nvisitors; i++) {    const SymbolString& name_left  = names_left[i];    const SymbolString& name_right = names_right[i];    if (indices_left[i] == NA_INTEGER) {      stop("'%s' column not found in lhs, cannot join", name_left.get_utf8_cstring());    }    if (indices_right[i] == NA_INTEGER) {      stop("'%s' column not found in rhs, cannot join", name_right.get_utf8_cstring());    }    visitors[i] =      join_visitor(        Column(left[indices_left[i] - 1], name_left),        Column(right[indices_right[i] - 1], name_right),        warn, na_match      );  }}

void VfkStream::Open(const VectorMap<int, String>& fns){	Close();	charset = CHARSET_ISO8859_2;	file_groups <<= fns;	streams.SetCount(file_groups.GetCount());	for(int i = 0; i < streams.GetCount(); i++)		if(!streams[i].Open(file_groups[i]))			throw Exc(NFormat("cannot open file '%s'", file_groups[i]));	indexfilename = GetTempFileName("vfk");	if(!indexfile.Open(indexfilename, FileStream::CREATE))		throw Exc(NFormat("cannot create indexfile '%s'", indexfilename));	String hdrname = "X_HEADER";	Table& hdr = tables.Add(hdrname);	hdr.name = hdr.rawname = hdrname;	hdr.header = true;	hdr.row_count = 0;	ASSERT(hdr.columns.GetCount() == HDR_ID);	hdr.AddColumn(Column("ID", STRING_V, 30));	ASSERT(hdr.columns.GetCount() == HDR_ORD);	hdr.AddColumn(Column("ORD", INT_V));	ASSERT(hdr.columns.GetCount() == HDR_STR);	hdr.AddColumn(Column("STR", STRING_V, 1000));	ASSERT(hdr.columns.GetCount() == HDR_NUM);	hdr.AddColumn(Column("NUM", DOUBLE_V));	ASSERT(hdr.columns.GetCount() == HDR_DTM);	hdr.AddColumn(Column("DTM", TIME_V));	ASSERT(hdr.columns.GetCount() == HDR_COUNT);	Scan();}

Matrix Matrix::Cofactor() const {	Matrix m(Row(), Column());	for (int i = 0; i < Row(); i++) {		for (int j = 0; j < Column(); j++) {			m(i, j) = Cofactor(i, j);		}	}	return m;}

WidgetBindings::WidgetBindings(QWidget *parent) :    WidgetQmfObject(parent){    this->setSectionName(QString("Bindings"));    summaryColumns.append(Column("msgMatched", "matched", Qt::AlignRight, "N", modeMessages, true));    summaryColumns.append(Column("msgMatched", "matched / sec", Qt::AlignRight, "N", modeMessageRate, true));    setRelatedText("Related bindings");}

static ColumnList calcSrcCols(int tilesetH){	ColumnList cols;	cols << Column(0, 0, tilesetH);	cols << Column(tsLaneW, 0, tilesetH);	return cols;}

static ColumnVec calcSrcCols(int tilesetH){	ColumnVec cols;	cols.reserve(2);	cols.push_back(Column(0, 0, tilesetH));	cols.push_back(Column(tsLaneW, 0, tilesetH));	return cols;}

voidRotationMatrix2<T>::Fixup( ){    Vector2<T> v0 = Column( 0 );    Vector2<T> v1 = Column( 1 );    v0.Normalize( );    v1 -= (v0 * v1) * v0;    v1.Normalize( );    m_matrix.Set( v0, v1 );}

voidRotationMatrix3<T>::Fixup( ){    Vector3<T> v0 = Column( 0 );    Vector3<T> v1 = Column( 1 );    Vector3<T> v2 = Column( 2 );    v0.Normalize( );    v1 -= (v0 * v1) * v0;    v1.Normalize( );    v2 -= (v0 * v2) * v0  +  (v1 * v2) * v2;    v2.Normalize( );    m_matrix.Set( v0, v1, v2 );}

bool NdbInfo::load_hardcoded_tables(void){  {    Table tabs("tables", 0);    if (!tabs.addColumn(Column("table_id", 0, Column::Number)) ||        !tabs.addColumn(Column("table_name", 1, Column::String)) ||        !tabs.addColumn(Column("comment", 2, Column::String)))      return false;    BaseString hash_key = mysql_table_name(tabs.getName());    if (!m_tables.insert(hash_key.c_str(), tabs))      return false;    if (!m_tables.search(hash_key.c_str(), &m_tables_table))      return false;  }  {    Table cols("columns", 1);    if (!cols.addColumn(Column("table_id", 0, Column::Number)) ||        !cols.addColumn(Column("column_id", 1, Column::Number)) ||        !cols.addColumn(Column("column_name", 2, Column::String)) ||        !cols.addColumn(Column("column_type", 3, Column::Number)) ||        !cols.addColumn(Column("comment", 4, Column::String)))      return false;    BaseString hash_key = mysql_table_name(cols.getName());    if (!m_tables.insert(hash_key.c_str(), cols))      return false;    if (!m_tables.search(hash_key.c_str(), &m_columns_table))      return false;  }  return true;}

Message ParserMixin::severityMessage(const ParseContextSPtr& context,                                     const Message::Severity& severity,                                     const char* message,                                     const Line& line,                                     const Column& column){    TokenizerPtr& tokenizer = context->tokenizer;    Line theLine = line;    if (theLine == Line(-1))    {        theLine = tokenizer->current()                ? tokenizer->current()->line()                : tokenizer->line();    }    Column theColumn = column;    if (theColumn == Column(-1))    {        theColumn = tokenizer->current()                  ? tokenizer->current()->beginColumn()                  : tokenizer->column();    }    return Message(severity, message, context->mSourceId, theLine, theColumn);}

TDbCell* RDbRow::Column(TInt aColIx) const//// aCol is now zero-based// Return a pointer to column aCol in the buffer// Return 0 if the column is past the end//	{	TInt ix=Column();	TDbCell* pC;	if (aColIx<ix)		{		ix=0;		pC=iFirst;		}	else		pC=iCell;	TDbCell* last=iLast;	for (;;)		{		if (pC>=last)			break;		if (ix>=aColIx)			break;		pC=pC->Next();		++ix;		}	CONST_CAST(RDbRow*,this)->SetCache(pC,ix);	return pC<last?pC:0;	}

/** * @brief    MATLAB-like meshgrid. x and y vectors must be specified z may be specified optionally. * * @param x  X-Vector * @param y  Y-Vector * @param z  Z-Vector (default: unused) * @return   Mesh grid O (Ny x Nx x Nz x 3) (if z specified) else O (Ny x Nx x 2)<br/> */template <class T> inline static Matrix<T>meshgrid (const Vector<T>& x, const Vector<T>& y, const Vector<T>& z = Vector<T>(1)) {	size_t nx = numel(x);	size_t ny = numel(y);	size_t nz = numel(z);	assert (nx > 1);	assert (ny > 1);	// Column vectors	assert (size(x,0) == nx); 	assert (size(y,0) == ny);	assert (size(z,0) == nz);	Matrix<T> res (ny, nx, (nz > 1) ? nz : 2, (nz > 1) ? 3 : 1);		for (size_t i = 0; i < ny * nz; i++) 		Row    (res, i          , x);	for (size_t i = 0; i < nx * nz; i++) 		Column (res, i + nx * nz, y);	if (nz > 1)		for (size_t i = 0; i < nz; i++)			Slice  (res, i +  2 * nz, z[i]);		return res;	}

void Parser::atom() {    if (tokens[look].type == REGEX_) {        atoms.push_back(Atom(REG, 0, 0, tokens[look].value, Column()));        match(REGEX_);    } else {        match(LESSTHAN);        if (tokens[look].type == TOKEN) {            match(TOKEN);        } else {            column();            cols[col[1]] = col[0];            atoms.push_back(Atom(COLUMN, 0, 0, col[1], Column()));        }        match(GREATETHAN);    }}

void VDUIListViewW32::AddColumn(const wchar_t *name, int width, int affinity) {	VDASSERT(affinity >= 0);	VDASSERT(width >= 0);	if (VDIsWindowsNT()) {		LVCOLUMNW lvcw={0};		lvcw.mask		= LVCF_TEXT | LVCF_WIDTH;		lvcw.pszText	= (LPWSTR)name;		lvcw.cx			= width;		SendMessageW(mhwnd, LVM_INSERTCOLUMNW, mColumns.size(), (LPARAM)&lvcw);	} else {		LVCOLUMNA lvca={0};		VDStringA nameA(VDTextWToA(name));		lvca.mask		= LVCF_TEXT | LVCF_WIDTH;		lvca.pszText	= (LPSTR)nameA.c_str();		lvca.cx			= width;		SendMessageA(mhwnd, LVM_INSERTCOLUMNA, mColumns.size(), (LPARAM)&lvca);	}	mColumns.push_back(Column());	Column& col = mColumns.back();	col.mWidth		= width;	col.mAffinity	= affinity;	mTotalWidth		+= width;	mTotalAffinity	+= affinity;	OnResize();}

EXPORT_C TAny* RDbRow::SetColumnWidthL(TDbColNo aColNo,TInt aWidth)// set the width for column aCol to Width// add extra NULL columns to buffer as required// return pointer to data for that column	{	__ASSERT(aColNo>0);	TDbCell* pC=Column(--aColNo);	if (pC==0)		{		// add extra NULL columns to buffer		if (aWidth==0)			return 0;	// setting to NULL, don't bother padding		TInt cFill=(aColNo-iColumn)*sizeof(TInt);		ExtendL(cFill+TDbCell::Size(aWidth));		pC=iCell;		Mem::FillZ(pC,cFill);		pC=PtrAdd(pC,cFill);		// set cache		SetCache(pC,aColNo);		}	else		{		TInt adjust=TDbCell::Size(aWidth)-pC->Size();	// how much to add		if (adjust!=0)			{			ExtendL(adjust);			pC=iCell;		// may have moved in extension			TDbCell* pNext=pC->Next();			TDbCell* pAdjust=PtrAdd(pNext,adjust);			Mem::Move(pAdjust,pNext,Diff(pAdjust,iLast));			}		}	pC->SetLength(aWidth);	return pC->Data();	}

/** * Write the error out to the stream. * * @param out -- The output stream to write the set to. */void Error_::Write_(Printer& out) const{    out << "(error /""         << this->id << "/"";    if (0 != Row())    {        out << " " << Row();    }    if (0 != Column())    {        out << " " << Column();    }           out << ")";}

Column View::getColumn(string id) {    for (int i = 0; i < columns.size(); i++) {        if (columns[i].name == id) {            return columns[i];        }    }    return Column("");}

// Return a copy of the column data specified by its index starting at 0// (use the Column copy-constructor)Column Statement::getColumn(const int aIndex){    checkRow();    checkIndex(aIndex);    // Share the Statement Object handle with the new Column created    return Column(mStmtPtr, aIndex);}

// Return a copy of the column data specified by its column name starting at 0// (use the Column copy-constructor)Column  Statement::getColumn(const char* apName){    checkRow();    const int index = getColumnIndex(apName);    // Share the Statement Object handle with the new Column created    return Column(mStmtPtr, index);}

 PersonColumns() {     columns << Column("uuid", "UUID PRIMARY KEY");     columns << Column("customer_uuid", "UUID");     columns << Column("name", "TEXT");     columns << Column("mail", "TEXT");     columns << Column("phone", "TEXT");     columns << Column("hidden", "INTEGER NOT NULL DEFAULT 0");     columns << Column("date_updated", "TEXT");     columns << Column("updated_by", "TEXT"); }

 CompressorColumns() {     columns << Column("uuid", "UUID PRIMARY KEY");     columns << Column("circuit_uuid", "UUID");     columns << Column("name", "TEXT");     columns << Column("manufacturer", "TEXT");     columns << Column("type", "TEXT");     columns << Column("sn", "TEXT");     columns << Column("date_updated", "TEXT");     columns << Column("updated_by", "TEXT"); }

size_t CColumnSet::AllocSize() const{	size_t nSize = 0;	for (size_t i = 0; i < Count(); ++i)		nSize += Column(i).AllocSize();	return nSize;}

WidgetSessions::WidgetSessions(QWidget *parent) :    WidgetQmfObject(parent){    this->setSectionName(QString("Sessions"));    summaryColumns.append(Column("unackedMessages", "unAcked", Qt::AlignRight, "N", modeMessages, true));    summaryColumns.append(Column("TxnCount", "transactions", Qt::AlignRight, "N", modeMessages, true, QColor(Qt::green)));    summaryColumns.append(Column("TxnStarts", "starts", Qt::AlignRight, "N", modeMessages));    summaryColumns.append(Column("TxnCommits", "commits", Qt::AlignRight, "N", modeMessages));    summaryColumns.append(Column("TxnRejects", "rejects", Qt::AlignRight, "N", modeMessages));    summaryColumns.append(Column("unackedMessages", "unAcked", Qt::AlignRight, "N", modeMessageRate, true));    summaryColumns.append(Column("TxnCount", "transactions", Qt::AlignRight, "N", modeMessageRate, true, QColor(Qt::green)));    summaryColumns.append(Column("TxnStarts", "starts", Qt::AlignRight, "N", modeMessageRate));    summaryColumns.append(Column("TxnCommits", "commits", Qt::AlignRight, "N", modeMessageRate));    summaryColumns.append(Column("TxnRejects", "rejects", Qt::AlignRight, "N", modeMessageRate));    setRelatedText("Related sessions");}

void PrintComputersMove (MOVE computersMove, STRING computersName){	int position = Unhasher_Index(computersMove);	int direction = Unhasher_Direction(computersMove);	printf ("%s moves the piece %c%d %s/n", computersName, /	        Column(position)+ROW_START, BOARD_ROWS-Row (position), /	        directions[direction]);}

/** * @brief Right hand side operator E (i.e. forward transform)  * * @param  in      Image * @param  sm      Sensitivities * @param  nx      Sizes & co. * @param  fts     FT operators * @return         K-space  */template <class T> inline static Matrix< std::complex<T> >E (const Matrix< std::complex<T> >& in, const Matrix< std::complex<T> >& sm,   const std::vector<size_t>& nx, const std::vector<NFFT<T> >& fts) {	Matrix< std::complex<T> > out (nx[2],nx[1]);#pragma omp parallel for default (shared)    for (int j = 0; j < nx[1]; j++)        Column (out, j, fts[omp_get_thread_num()] * (resize(((nx[0] == 2) ? Slice (sm, j) : Volume (sm, j)),size(in)) * in));    return out;}

/** * @brief Left hand side operator (i.e. inverse transform)  * * @param  in      K-space * @param  sm      Sensitivities  * @param  nx      Sizes & co. * @param  fts     FT operators * @return         Image */template <class T> inline static Matrix< std::complex<T> >EH (const Matrix< std::complex<T> >& in, const Matrix< std::complex<T> >& sm,    const std::vector<size_t>& nx, const std::vector<NFFT<T> >& fts) {	Matrix< std::complex<T> > out = zeros< std::complex<T> > (size(sm));#pragma omp parallel for default (shared)	for (int j = 0; j < nx[1]; j++)        Slice (out, j, fts[omp_get_thread_num()] ->* Column (in,j) * conj(Slice (sm, j))); 	return sum (out, nx[0]);}

/** * @param index Индекс столбца (начиная с 0). * @return Столбец с индексом <code>index</code>. * @throw OutOfRange Номер столбца за пределами допустимых значений. */inlineQuery::ColumnQuery::Columns::operator[]( const std::size_t index ) const{    if ( size() <= index ) {        OutOfRange const ex("Query::Columns index out of range");        MSLIBS_SQLITE_THROW( ex );    }    return Column( stmtptr_ , index );}