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Why do we not have a virtual constructor in C++?
...uctor ends.In order for the constructor to be dispatched using the virtual table , there has to be an existing object with a pointer to the virtual table , but how can a pointer to the virtual table exist if the object still doesn't exist? :)
Logic reason
You use the virtual keyword when you want ...
How to remove leading and trailing whitespace in a MySQL field?
I have a table with two fields (countries and ISO codes):
11 Answers
11
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What is the difference between the kernel space and the user space?
...ine hardware (and everything else on the machine). To keep the machine as stable as possible, you normally want only the most trusted, well-tested code to run in kernel mode/kernel space.
The stack is just another part of memory, so naturally it's segregated right along with the rest of memory.
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How to concatenate text from multiple rows into a single text string in SQL server?
Consider a database table holding names, with three rows:
47 Answers
47
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MySQL/SQL: Group by date only on a Datetime column
Having a table with a column like: mydate DATETIME ...
4 Answers
4
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C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ColumnCount();
///使用某个shet，shit，shit
BOOL LoadSheet(long table_index,BOOL pre_load = FALSE);
///通过名称使用某个sheet，
BOOL LoadSheet(const TCHAR* sheet,BOOL pre_load = FALSE);
///通过序号取得某个Sheet的名称
CString GetSheetName(long table_index);
/...
Are PDO prepared statements sufficient to prevent SQL injection?
...ght get to see someone else's password. Since the first few names in users table tend to be admins, you may have also just given away the farm. (Also note: this is one more reason not to store passwords in plain text!)
We see, then, that prepared statements are enough for a single query, but by the...
How can I do test setup using the testing package in Go
...uages. Often, there's relatively fewer test functions, but each contains a table-driven set of test cases. See this article written by one of the Go team.
With a table-driven test, you simply put any setup code before the loop that executes the individual test-cases specified in the table, and put ...
What are the “must have” jQuery plugins? [closed]
...n those which are likely to be useful in general UI development, such as Tablesorter , rather than those which serve uncommon needs.
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Can I create a One-Time-Use Function in a Script or Stored Procedure?
...s like:
create procedure #mytemp as
begin
select getdate() into #mytemptable;
end
in an SQL script, but not functions. You could have the proc store it's result in a temp table though, then use that information later in the script ..
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