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How to convert a std::string to const char* or char*?
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If you just want to pass a std::string to a function that needs const char* you can use
std::string str;
const char * c = str.c_str();
If you want to get a writable copy, like char *, you can do that with this:
std::string ...
How to get a pixel's x,y coordinate color from an image?
Is there any way to check if a selected(x,y) point of a PNG image is transparent?
4 Answers
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LR性能测试结果样例分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...图1- 2所示。概要中列出了场景执行情况、“Statistics Summary（统计信息摘要）”、“Transaction Summary（事务摘要）”以及“HTTP Responses Summary（HTTP响应摘要）”等。以简要的信息列出本次测试结果。
图1- 2性能测试结果摘要图
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iOS UIImagePickerController result image orientation after upload
I am testing my iPhone application on an iOS 3.1.3 iPhone. I am selecting/capturing an image using a UIImagePickerController :
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Rotating a point about another point (2D)
I'm trying to make a card game where the cards fan out. Right now to display it Im using the Allegro API which has a function:
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Extracting text OpenCV
I am trying to find the bounding boxes of text in an image and am currently using this approach:
10 Answers
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How to use the IEqualityComparer
I have some bells in my database with the same number. I want to get all of them without duplication. I created a compare class to do this work, but the execution of the function causes a big delay from the function without distinct, from 0.6 sec to 3.2 sec!
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git pull while not in a git directory
Let's say I have a directory, /X/Y , which is a git repository. Is it possible to somehow call a command like git pull from inside /X , but targeting the /X/Y directory?
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How do I format a date in Jinja2?
Using Jinja2, how do I format a date field? I know in Python I can simply do this:
9 Answers
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How does Dijkstra's Algorithm and A-Star compare?
I was looking at what the guys in the Mario AI Competition have been doing and some of them have built some pretty neat Mario bots utilizing the A* (A-Star) Pathing Algorithm.
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