In C++, results of assignment operation, prefix increment and prefix decrement are all lvalues, the updated objects. Whereas in C, those results are all rvalues, just values of expressions, not objects that have memory loctions. Error disappeared aft…

in script,i use HttpWebRequest to get service from network.but it comes a mysterious problem. the source code: string url = "http://apis.baidu.com/apistore/vop/baiduvopjson"; HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); print…

http://www.raywenderlich.com/10518/how-to-use-uiscrollview-to-scroll-and-zoom-content Getting Started Fire up Xcode and create a new project with the iOS\Application\Single View Application template. Enter ScrollViews for the product name, enter the…

Automake是用来根据Makefile.am生成Makefile.in的工具 标准Makefile目标 'make all' Build programs, libraries, documentation, etc. (same as 'make'). 'make install' Install what needs to be installed, copying the files from the package's tree to system-wide directories.…

原文链接:http://code.tutsplus.com/tutorials/24-javascript-best-practices-for-beginners--net-5399 jquery代码优化见   writing better jquery code another good writing :24 JavaScript Best Practices for Beginners Twice a month, we revisit some of our readers’ favo…

原地址 http://www.cplusplus.com/doc/tutorial/pointers/ Pointers In earlier chapters, variables have been explained as locations in the computer's memory which can be accessed by their identifier (their name). This way, the program does not need to care…

Optional URI Parameters and Default Values You can make a URI parameter optional by adding a question mark to the route parameter. If a route parameter is optional, you must define a default value for the method parameter. public class BooksControlle…

It is great to be able to build small utilities on top of an excellent RDBMS. Thank you MySQL. This is a small but complex utility to perform online schema change for MySQL. We call it OSC and the source is here. Some ALTER TABLE statements take too…

1. Spring local cache   [Spring 本地缓存] Spring provided cacheable annotation since 3.1. It's very super convinient to use and can obviously boost application performance. 从3.1版本开始,Spring提供了cacheable注解.它使用起来非常方便,还可以很明显的提升应用性能.具体的,怎么使用呢? First, create a…

初学PHP的时候使用了一些文件读取API,但是没有真正弄清楚各API的区别以及差异,于是找了一篇学习了一下,贴在这里,引用自IBM社区的一篇文章, 整体整理测试如下 <?php /** * Created by PhpStorm. * User: f3ngt1ng * Date: 2017/2/15 * Time: 9:11 */ //The right way to read files with php //URL:https://www.ibm.com/developerworks/lib…