Functions function is a concept for C programming language, objective-c is entirely relies on C. To define a function, you need provide four components: return value, function name, parameters and code block. like this: 1 2 3 int getRandomInteger(int…

总结: 1.无论一个类实例化多少对象,它的静态变量只有一份拷贝: 静态域属于类,而非由类构造的实例化的对象,所有类的实例对象共享静态域. class Employee { private static int nextId = 1; private int id; ... } 静态变量 静态常量 public clas Math { ... public static final double PI = 3.14159...; } 静态方法不能向对象实施操作 Math.pow(2,10); Em…

[register/auto的比較分析] #include <iostream> using namespace std; int main(){ int i,sum=0; for(i=0;i<=100;i++) sum+=i; cout<<"The sum="<<sum<<endl; } #include <iostream> using namespace std; int main(){ register int…

static 用于修饰成员 修饰成员变量和成员函数 被修饰过的成员的特点:   1.随着类的载入而载入   2.优先于对象而存在   3.被全部对象所共享   4.能够直接被类名调用…

转自:https://gcc.gnu.org/onlinedocs/gcc-4.0.0/gcc/Function-Attributes.html 5.24 Declaring Attributes of Functions In GNU C, you declare certain things about functions called in your program which help the compiler optimize function calls and check your…

转义字符: 换行符 \n   水平制表符\t 纵向制表符 \v 退格符 \b 回车符 \r   进纸符 \f 报警(响铃)符 \a 反斜线 \\ 疑问号 \? 单引號 \' 双引號 \"   keyword asm  =>__asm auto bad_cast bad_typeid bool break case catch char class const const_cast continue default delete do double dynamic_cast else enu…

Use Reentrant Functions for Safer Signal Handling 使用可重入函数进行更安全的信号处理 How and when to employ reentrancy to keep your code bug free 何时及如何利用可重入性避免代码缺陷 Dipak Jha (mailto:dipakjha@in.ibm.com?subject=Use reentrant functions for safer signal handling&cc=dipa…

static - JavaScript | MDN https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes/static The static keyword defines a static method for a class. Static methods aren't called on instances of the class. Instead, they're called on the…

Classes are syntactic sugar over functions and functions are also referred to as "callable" objects. So it is possible to treat a function like an object and give them key / value properties like objects. The static keyword gives us the ability…

asp.net Razor 视图具有.cshtml后缀,可以轻松的实现c#代码和html标签的切换,大大提升了我们的开发效率.但是Razor语法还是有一些棉花糖值得我们了解一下,可以更加强劲的提升我们的开发效率,减少开发bug的出现. Razor 采用的是@ 尾巴符号,正是这个符号成就了Mvc开发效率的提升.下面了解一下和@相关的两个可以重用的helper.functions. 作为现代化的程序员,我们尽可能的遵守一个原则.不要重复你自己.所以能够重构的代码我们都会合并,但是这是对于后台代码C#…