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Parsing CSV files in C#, with header
... Yourself - no need to re-invent the wheel a gazillionth time....
You basically just need to define that shape of your data - the fields in your individual line in the CSV - by means of a public class (and so well-thought out attributes like default values, replacements for NULL values and so forth...
Is there a version control system for database structure changes?
... keeps track of your current db version.
To migrate up, you run a command called "db:migrate" which looks at your version and applies the needed scripts. You can migrate down in a similar way.
The migration scripts themselves are kept in a version control system -- whenever you change the database...
Programmatically align a toolbar on top of the iPhone keyboard
...nputAccessoryView property, which you can set to any view, that is automatically displayed above and animated with the keyboard.
Note that the view you use should neither be in the view hierarchy elsewhere, nor should you add it to some superview, this is done for you.
...
Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
...an Optional variable gets around this issue because an Optional is automatically initialized with nil and the value it will eventually contain will still be immutable. However, it can be a pain to be constantly unwrapping a variable that you know for sure is not nil. Implicitly Unwrapped Optionals a...
CGridCellNumeric - A numeric cell class for the MFC Grid - C/C++ - 清泛网 - 专注IT技能提升
...t the options for the numerical cell, you have to get a pointer to it, and call one of its member functions.
CGridCellNumeric *pCell = (CGridCellNumeric *)m_Grid.GetCell(1, 1);
pCell->SetFlags(CGridCellNumeric::Currency | CGridCellNumeric::Negative);
pCell->SetNumber(125.36);
The CGridCellNume...
CGridCellNumeric - A numeric cell class for the MFC Grid - C/C++ - 清泛网 - 专注IT技能提升
...t the options for the numerical cell, you have to get a pointer to it, and call one of its member functions.
CGridCellNumeric *pCell = (CGridCellNumeric *)m_Grid.GetCell(1, 1);
pCell->SetFlags(CGridCellNumeric::Currency | CGridCellNumeric::Negative);
pCell->SetNumber(125.36);
The CGridCellNume...
CGridCellNumeric - A numeric cell class for the MFC Grid - C/C++ - 清泛网 - 专注IT技能提升
...t the options for the numerical cell, you have to get a pointer to it, and call one of its member functions.
CGridCellNumeric *pCell = (CGridCellNumeric *)m_Grid.GetCell(1, 1);
pCell->SetFlags(CGridCellNumeric::Currency | CGridCellNumeric::Negative);
pCell->SetNumber(125.36);
The CGridCellNume...
CGridCellNumeric - A numeric cell class for the MFC Grid - C/C++ - 清泛网 - 专注IT技能提升
...t the options for the numerical cell, you have to get a pointer to it, and call one of its member functions.
CGridCellNumeric *pCell = (CGridCellNumeric *)m_Grid.GetCell(1, 1);
pCell->SetFlags(CGridCellNumeric::Currency | CGridCellNumeric::Negative);
pCell->SetNumber(125.36);
The CGridCellNume...
CGridCellNumeric - A numeric cell class for the MFC Grid - C/C++ - 清泛网 - 专注IT技能提升
...t the options for the numerical cell, you have to get a pointer to it, and call one of its member functions.
CGridCellNumeric *pCell = (CGridCellNumeric *)m_Grid.GetCell(1, 1);
pCell->SetFlags(CGridCellNumeric::Currency | CGridCellNumeric::Negative);
pCell->SetNumber(125.36);
The CGridCellNume...
CGridCellNumeric - A numeric cell class for the MFC Grid - C/C++ - 清泛网 - 专注IT技能提升
...t the options for the numerical cell, you have to get a pointer to it, and call one of its member functions.
CGridCellNumeric *pCell = (CGridCellNumeric *)m_Grid.GetCell(1, 1);
pCell->SetFlags(CGridCellNumeric::Currency | CGridCellNumeric::Negative);
pCell->SetNumber(125.36);
The CGridCellNume...