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ATL CComPtr和CComQIPtr详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
void Func(IUnknown * punk)
{
CComQIPtr<IXXX> pno(punk);
if(pno)
{
//正确转换
pno->doSomething();
}
}
(2) 赋值
赋值的时候，发生下面三件事：
如果当前指针不为空，那么释放当前指针
如果源指针不为空，那...
Async Image Loader Extension：异步图像加载器扩展 - App Inventor 2 拓展...
...e loader since it does not uses any external library to load images.
Specifications[size=15.008px] Size: 9.36 KB
Version: 5.0
Minimum API Level: 7
Updated On: February 18, 2025 (Calcutta)
Built & documented using: [color=var(--tertiary)]FAST-CLI 12Event:[size=15.008px]AsyncI...
How to add spacing between UITableViewCell
...
My easy solution using Swift :
// Inside UITableViewCell subclass
override func layoutSubviews() {
super.layoutSubviews()
contentView.frame = contentView.frame.inset(by: UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10))
}
Result
...
Java: Integer equals vs. ==
...s I'm going to encounter, the value would be under 127. Good to catch this now though for the 5% where it isn't.
– Jeremy Goodell
Sep 3 '10 at 17:36
1
...
How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
.... [a-z] matches any single lower case letter of the alphabet.
() Groups different matches for return purposes. See examples below.
{} Multiplier for repeated copies of pattern defined before it.
E.g. [a]{2} matches two consecutive lower case letter a: aa
E.g. [a]{1,3} matches at least one and ...
Writing handler for UIAlertAction
...on!) in println("Foo")}))
this is the proper way to define handlers in Swift.
As Brian pointed out below, there are also easier ways to define these handlers. Using his methods is discussed in the book, look at the section titled Closures
...
ERROR: Error 1005: Can't create table (errno: 121)
...ly for you, and it brought me here. I quote:
You will get this message if you're trying to add a constraint with a
name that's already used somewhere else
To check constraints use the following SQL query:
SELECT
constraint_name,
table_name
FROM
information_schema.table_constrain...
Get Android API level of phone currently running my application [duplicate]
...s various pieces of information about the Android OS a system is running.
If you care about all versions possible (back to original Android version), as in minSdkVersion is set to anything less than 4, then you will have to use android.os.Build.VERSION.SDK, which is a String that can be converted t...
Better way to cast object to int
...
You have several options:
(int) — Cast operator. Works if the object already is an integer at some level in the inheritance hierarchy or if there is an implicit conversion defined.
int.Parse()/int.TryParse() — For converting from a string of unknown format.
int.ParseExact()/int...
What is lexical scope?
...t deduce the outer dynamic scope of a function, consider our last example. If we write something like this:
if(/* some condition */)
dummy1();
else
dummy2();
The call chain depends on a run time condition. If it is true, then the call chain looks like:
dummy1 --> fun()
If the condit...