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ListCtrl 重绘（Custom Draw） - C/C++ - 清泛网 - 专注C/C++及内核技术
...NMHDR* pNMHDR, LRESULT* pResult )
{
NMLVCUSTOMDRAW* pLVCD = reinterpret_cast<NMLVCUSTOMDRAW*>( pNMHDR );
// Take the default processing unless we set this to something else below.
*pResult = 0;
// First thing - check the draw stage. If it's the control's prepaint
// stage,...
convert a list of objects from one type to another using lambda expression
...ound when (or if) it can be used. I just tried it and was getting a cannot cast expression exception
– Collin M. Barrett
Aug 1 '18 at 16:26
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How to find largest objects in a SQL Server database?
... Dec 12 '14 at 15:11
Gregory LancasterGregory Lancaster
75355 silver badges66 bronze badges
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Get current date in milliseconds
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Casting the NSTimeInterval directly to a long overflowed for me, so instead I had to cast to a long long.
long long milliseconds = (long long)([[NSDate date] timeIntervalSince1970] * 1000.0);
The result is a 13 digit times...
When should you use 'friend' in C++?
...t;typename Derived>
struct Policy {
void doSomething() {
// casting this to Derived* requires us to see that we are a
// base-class of Derived.
some_type const& t = static_cast<Derived*>(this)->getSomething();
}
};
// note, derived privately
template...
Correct use of Multimapping in Dapper
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I just ran a test that works fine:
var sql = "select cast(1 as decimal) ProductId, 'a' ProductName, 'x' AccountOpened, cast(1 as decimal) CustomerId, 'name' CustomerName";
var item = connection.Query<ProductItem, Customer, ProductItem>(sql,
(p, c) => { p.Customer ...
How to get the first and last date of the current year?
...only attach the year to that day and month for example:-
SELECT '01/01/'+cast(year(getdate()) as varchar(4)) as [First Day],
'12/31/'+cast(year(getdate()) as varchar(4)) as [Last Day]
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im...
How do you determine the size of a file in C?
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You could probably change the return type to ssize_t and cast the size from an off_t without any trouble. It would seem to make more sense to use a ssize_t :-) (Not to be confused with size_t which is unsigned and cannot be used to indicate error.)
– Ted Perci...
Difference between \n and \r?
... \r\n. Various protocols based on Telnet require it, including SMTP, POP3, FTP, HTTP, ...
– Marquis of Lorne
Aug 8 '14 at 23:31
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SQLite DateTime comparison
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Sqlite can not compare on dates. we need to convert into seconds and cast it as integer.
Example
SELECT * FROM Table
WHERE
CAST(strftime('%s', date_field) AS integer) <=CAST(strftime('%s', '2015-01-01') AS integer) ;
...