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Linux bpftrace学习笔记(持续更新) - 操作系统(内核) - 清泛网移动版 - ...

...lib64/gconv/gconv-modules.cache [...] 2、列出与open系统调用相关的跟踪点函数名: # bpftrace -l 'tracepoint:syscalls:sys_enter_open*' tracepoint:syscalls:sys_enter_open_by_handle_at tracepoint:syscalls:sys_enter_open tracepoint:syscalls:sys_enter_openat 3、工具开始运...
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What is ECMAScript?

...ript validator and everybody who works with JavaScript will tell you that alert("hello World"); is valid JavaScript. And I'd also agree. However, a ECMAScript validator will probably tell you it is not valid, because alert() is not part of the ECMAScript, but a typically feature of JavaScript fo...
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scoped_ptr 与 auto_ptr 与 shared_ptr 区别总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...hared_ptr 区别总结1.auto_ptr 被复制后,将失去原来所致资源的所有权;2.scoped_ptr永远不能被复制或被赋值!scoped_ptr拥有它所指向的资源的所有权,并永远不会放弃这个所有权;3.shared_ptr 是可以共享所有权的智能指针。1.auto_ptr 被...
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解决:调MFC dll时发生AfxGetInstanceHandle()断言错误 - C/C++ - 清泛网 -...

...= NULL);崩溃 说明:这个函数使你能够获得当前应用程序的实例句柄。AfxGetInstanceHandle总是返回代表你的可执行文件(.EXE)的HINSTANCE值,除非它从与MFC的USRDLL版本连接的DLL内调用的。在这种情况下,它返回的是DLL的HINSTANCE值。 ...
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分享一款界面简单清爽的404页面 - 源码下载 - 清泛网 - 专注C/C++及内核技术

分享一款界面简单清爽的404页面404 源码效果图:更多界面美观的404页面下载请戳:http: www.tsingfun.com html 2016 code_0628 84.html效果图: 更多界面美观的404页面下载请戳:https://www.tsingfun.com/html/2016/code_0628/84.htmlWinXP,Win7,Win8,Win10,Linux...
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解决:调MFC dll时发生AfxGetInstanceHandle()断言错误 - VC/MFC - 清泛IT...

...= NULL);崩溃 说明:这个函数使你能够获得当前应用程序的实例句柄。AfxGetInstanceHandle总是返回代表你的可执行文件(.EXE)的HINSTANCE值,除非它从与MFC的USRDLL版本连接的DLL内调用的。在这种情况下,它返回的是DLL的HINSTANCE值。 ...
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Best way to detect when a user leaves a web page?

...lientY < 0)) { //window.localStorage.clear(); //alert("Y coords: " + window.event.clientY) } }; In my example, I am clearing local storage and alerting the user with the mouses y coords, only when the browser is closed, this will be ignored on all page loads from...
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C/C++ 如何向上取整? - C/C++ - 清泛网 - 专注C/C++及内核技术

...or函数(整数直接除就ok)。 使用floor函数。floor(x)返回的是小于或等于x的最大整数。 如: floor(10.5) == 10 floor(-10.5) == -11 使用ceil函数。ceil(x)返回的是大于x的最小整数。 如: ceil(10.5) == 11 ceil(-10.5) ==-10 floor()是向...
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How to get JSON from URL in JavaScript?

...leswithkeys&callback', function(err, data) { if (err !== null) { alert('Something went wrong: ' + err); } else { alert('Your query count: ' + data.query.count); } }); Note that data is an object, so you can access its attributes without having to parse it. ...
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Changing the interval of SetInterval while it's running

...our command at regular time intervals . In the following example, I run an alert every 2 seconds and the interval (intrv) can be changed dynamically... var i=1; var intrv=2; // << control this variable var refreshId = setInterval(function() { if(!(i%intrv)) { alert('run!'); } i++; ...