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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 ...
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...
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...
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 ...
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...