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Canvas width and height in HTML5

...xed; } #content { position: absolute; margin: 0 1em; font-size: xx-large; font-family: sans-serif; font-weight: bold; text-shadow: 2px 2px 0 #FFF, -2px -2px 0 #FFF, -2px 2px 0 #FFF, 2px -2px 0 #FFF; } <canvas id="c"></ca...
https://www.tsingfun.com/it/tech/886.html 

快速开发CSS的利器LESS 系列教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...less.js,并将less.js文件引入html页面中。 注意: 引入 XX.less 文件时,rel属性要设置为“stylesheet/less” less.js 之前引入.less后缀的文件,即less.js最后引入。 运行环境 服务器运行(本地运行无效) 基本demo: <!doctype html> <h...
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Difference between `constexpr` and `const`

...cx2(x, 1); // OK: runtime initialization constexpr double xx = COMP.real(); // OK: compile-time initialization constexpr double imaglval = COMP.imag(); // OK: compile-time initialization complex cx3(2, 4.6); // OK: runtime initialization Tips from the ...
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How to generate a random string of a fixed length in Go?

...d is a test file, not an executable. You have to save it into a file named XX_test.go and run it with go test -bench . -benchmem Foreword: The fastest solution is not a go-to solution if you just need a random string. For that, Paul's solution is perfect. This is if performance does matter. A...
https://www.tsingfun.com/it/tech/1429.html 

正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...是用尖括号代替圆括号吧。现在我们的问题变成了如何把xx <aa <bbb> <bbb> aa> yy这样的字符串里,最长的配对的尖括号内的内容捕获出来? 这里需要用到以下的语法构造: (?'group') 把捕获的内容命名为group,并压入堆栈(Stack) (?'-gr...
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How do I print a list of “Build Settings” in Xcode project?

...nBuildProductsLocation" JAVAC_DEFAULT_FLAGS "-J-Xms64m -J-XX:NewSize=4M -J-Dfile.encoding=UTF8" JAVA_APP_STUB /System/Library/Frameworks/JavaVM.framework/Resources/MacOS/JavaApplicationStub JAVA_ARCHIVE_CLASSES YES JAVA_ARCHIVE_TYPE ...
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Repeat String - Javascript

...) s += x; return s; } /* Example of output: stringFill1('x', 3) == 'xxx' */ The syntax is here is clear. As you can see, we've used local function variables already, before going on to more optimizations. Be aware that there's one innocent reference to an object property s.length in the c...
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Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...,完全没有static final的变量好用、高效。 Handler发送消息时尽量使用obtain去获取已经存在的Message对象进行复用,而不是新new Message对象,这样可以减轻内存压力。 在使用后台Service时尽量将能够替换为IntentService的地方替换...
https://www.tsingfun.com/it/os_kernel/1290.html 

Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

...;而对带窗口的程序,可以写日志文件,也可以发Windows消息。我采用了SendMessage来处理调试信息,具体实现请参看下面的代码。 最终的实现是由一个线程来实现Dokan虚拟磁盘的,目录与文件的同步函数则放到一个单独的单元文...