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c/c++如何判断指针无效？如NULL,0xcccccccc,0xfeeefeee,野指针等 - C/C++ -...
...SERT(!AfxIsValidAddress(null, 5));
IsBadWritePtr, IsBadReadPtr
BOOL AFXAPI AfxIsValidAddress(const void* lp, UINT nBytes,
BOOL bReadWrite /* = TRUE */)
{
// simple version using Win-32 APIs for pointer validation.
return (lp != NULL && !IsBadReadPtr(lp, nBytes) &&
(!bReadWrite || !IsBadWrit...
PHP完美实现GIF动画缩略图 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ew.gif
有个细节问题：convert版本会比php版本小一些，这是API实现不一致所致。
另外，如果缩略图尺寸不符合原图比例，为了避免变形，还要考虑裁剪或者是补白，由于本文主要讨论GIF动画缩略图的特殊性，就不再继续讨论这些...
【免费开放】App Inventor 2 LLMAI2Ext 自研拓展：接入DeepSeek、Kimi、通...
...我们尽量将接口方法设计得简单易用，由于demo中包含了APIKey，因此不直接提供aia源码，这里以Kimi为例，附上代码块：开始对话：切换输出模式（默认流式输出，可切换非流式一把输出内容）：流式输出响应事件，每输出一部分...
Async Image Loader Extension：异步图像加载器扩展 - App Inventor 2 拓展...
...es.
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]AsyncImage has total 1 event. OnError[size=15.008px][size=15.008px]Even...
Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?
... interact with the rest of the program only through a small, simple public API. Then you can think about them in terms of that API instead of the internal details, which is important because people can only keep a limited amount of details in mind at the same time.
– Michael Bo...
When is a function too long? [closed]
...
@PedroMorteRolo Exactly. The standard API isn't always a model of elegance. Furthermore, much of the Java API was developed with an intimate knowledge of the Java Compiler and JVM, hence you have performance considerations that may explain it. I concede that cr...
Is there a properly tested alternative to Select2 or Chosen? [closed]
...tialized properly from existing <select> and <input> elements.
APITests core API methods for proper functionality.
EventsEnsures built-in events get fired at the right times with the proper arguments.
XSSTests a handful of potential exploits.
With that said, the tests aren't as expansi...
How to change theme for AlertDialog
... Don't use @android:style/AlertDialog. It is not in the public API. As a consequence, in Android 2.3.3, it crashes when creating the builder.
– Catalin Morosan
Mar 14 '11 at 12:56
...
What are the relative strengths and weaknesses of Git, Mercurial, and Bazaar? [closed]
...Mercurial is written in C (core, for performance) and Python, and provides API for extensions; Bazaar is written in Python, and provides API for extensions.
In considering each of them with one another and against version control systems like SVN and Perforce, what issues should be considered?
V...
What is the correct way to create a single-instance WPF application?
...wer. If anyone knows a more correct way to bring the form to the top using API's, feel free to add that.
– Nidonocu
Feb 9 '09 at 2:11
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