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Where do “pure virtual function call” crashes come from?
...alls the base class version, which in the case of a pure virtual function, doesn't exist.
(See live demo here)
class Base
{
public:
Base() { doIt(); } // DON'T DO THIS
virtual void doIt() = 0;
};
void Base::doIt()
{
std::cout<<"Is it fine to call pure virtual function from con...
StatusbarTools 扩展 - 状态栏自定义工具 · App Inventor 2 中文网
...
基本颜色设置
when Screen1.Initialize
do
// 设置状态栏为蓝色背景
call StatusbarTools1.SetBackgroundColor "#2196F3"
// 设置图标为白色
call StatusbarTools1.SetIconColor "Light"
透明状态栏
when Button1....
How do I parse a URL into hostname and path in javascript?
...
Experimental technology: IE doens't support this! developer.mozilla.org/en-US/docs/Web/API/URL/…
– cwouter
Mar 18 '15 at 15:08
10
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How to capture the browser window close event?
I want to capture the browser window/tab close event.
I have tried the following with jQuery:
17 Answers
...
How can I restart a Java application?
...va";
final File currentJar = new File(MyClassInTheJar.class.getProtectionDomain().getCodeSource().getLocation().toURI());
/* is it a jar file? */
if(!currentJar.getName().endsWith(".jar"))
return;
/* Build command: java -jar application.jar */
final ArrayList<String> command = ...
How do I get a file name from a full path with PHP?
For example, how do I get Output.map
14 Answers
14
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fs: how do I locate a parent folder?
How do I write this to go back up the parent 2 levels to find a file?
11 Answers
11
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How do I join two lists in Java?
Conditions: do not modifiy the original lists; JDK only, no external libraries. Bonus points for a one-liner or a JDK 1.3 version.
...
How to find Unused Amazon EC2 Security groups
...o determine orphan security groups so I can clean up and get rid of them. Does anyone know of a way to discover unused security groups.
...
Is there a use-case for singletons with database access in PHP?
I access my MySQL database via PDO. I'm setting up access to the database, and my first attempt was to use the following:
1...