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What is the difference between an interface and abstract class?

...'t do anything. It's just a pattern. For example (pseudo code): // I say all motor vehicles should look like this: interface MotorVehicle { void run(); int getFuel(); } // My team mate complies and writes vehicle looking that way class Car implements MotorVehicle { int fuel; vo...
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PHP exec() vs system() vs passthru()

... They have slightly different purposes. exec() is for calling a system command, and perhaps dealing with the output yourself. system() is for executing a system command and immediately displaying the output - presumably text. passthru() is for executing a system command which...
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内存管理内幕:动态分配的选择、折衷和实现 - C/C++ - 清泛网 - 专注C/C++及内核技术

...II 上进行汇编语言编程的时代,那时内存管理还不是个大问题。您实际上在运行整个系统。系统有 多少内存,您就有多少内存。您甚至不必费心思去弄明白它有多少内存,因为每一台机器的内存数量都相同。 所以,如果内存需...
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How can I get the current page name in WordPress?

...theme.php, inside the function get_page_template(), which is of course is called before your page theme files are parsed, so it is available at any point inside your templates for pages. Although it doesn't appear to be documented, the $pagename var is only set if you use permalinks. I guess this i...
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C语言面试那些事儿──一道指针与数组问题 - C/C++ - 清泛网 - 专注C/C++及内核技术

C语言面试那些事儿──一道指针与数组问题首先看如下代码:int main(int argc, char** argv){ int a[5] = {1,2,3,4,5}; int* ptr = (int*)(&a + 1); ...首先看如下代码: int main(int argc, char** argv) { int a[5] = {1,2,3,4,5}; int* ptr = (int*)(&a + 1); ...
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Picture Control(图片控件)中静态显示位图,解决位图不显示的问题 - C/C++ ...

...cture Control(图片控件)中静态显示位图,解决位图不显示的问题Picture Control(图片控件)中静态显示位图,如果出现不显示的问题,可以再手动调一下ShowWindow方法,一般就OK了。Picture Control(图片控件)中静态显示位图,代码如下: v...
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过去十年你吃的月饼有什么问题 - 资讯 - 清泛网 - 专注C/C++及内核技术

过去十年你吃的月饼有什么问题大数据告诉你,过去十年你吃的月饼有什么问题。 月饼 问题
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重装系统后硬盘不引导了怎么办? - 更多技术 - 清泛网 - 专注C/C++及内核技术

...冷静思考了一下,能用U盘启动到XP桌面,硬件应该是没有问题的!WINDOWS系统也应该是没有问题的!最有可能出现的问题是硬盘的主引导(MBR)扇区,一定有问题!因为U盘引导后,菜单上选择从硬盘启动可以正常进入硬盘上的XP...
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宽度默认980px?手机浏览器及pc浏览器width自适应问题 - 更多技术 - 清泛网...

宽度默认980px?手机浏览器及pc浏览器width自适应问题Tips: 调试 iPad 或 iPhone 可在设置中启动调试模式,在 Mac 中的 Safari 浏览器 同样开启开发者模式后,进行联机调试。功能彪悍...Tips: 调试 iPad 或 iPhone 可在设置中启动调试模式,...
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Discuz与phpsso整合时无法同步登录:通过js load 另一个 script 文件导致的...

...合时无法同步登录:通过js load 另一个 script 文件导致的问题phpsso document.write 没有执行在 web 开发中,出于跨域同步、远程调用等目的,经常需要在网页中通过 script 加载另一段远程 script。最常用最简单的方法就是直接用 documen...