在C++中,引用比指针更加的安全,一方面是因为引用咋定义时必须进行初始化,另一方面是引用一旦被初始化就无法使其与其他对象相关联. 但是,在使用引用的地方仍然会有一些例外. (1)Reference to value at uninitialized pointer 1 int *ptr; 2 int &ref = *ptr; //Reference to value at some random memory location (2)Reference to a local variable i…

jsp页面有黄色问号代表我们的html标签不符合规范 对于很多人拿到页面美工给的页面,有时候很多都有黄色的问号. 为什么会这样呢? Multiple annotations found at this line: - Invalid location of tag (form). - No end tag (</form>). 其实原因很简单,也就是说我们将html标签的嵌套层次写错了 而一般我们美工做的页面都是存在这样一个问题 将 from 嵌入到了table中 所以 , 解决此类问题也很简…

转自:https://blog.csdn.net/tanzuai/article/details/41896579 在jsp页面使用标签过程中有时候不注意规则的话,eclipse会提示一些错误,下面针对这些错误提出相应的解决办法: <form></form>标签 1. Invalid location of tag (form) form 应该写到table外面去,并且form标签里面也不能套form标签.<style></style>2. Invalid…

在jsp页面使用标签过程中有时候不注意规则的话,eclipse会提示一些错误,下面针对这些错误提出相应的解决办法: <form></form>标签 1. Invalid location of tag (form) form 应该写到table外面去,并且form标签里面也不能套form标签.<style></style>2. Invalid location of tag (style)  style应该写在head里面.<script><…

Nginx location模块整理 具体的Nginx安装就不在这里描述了,这里只是为了对location的描述 Nginx环境 a. 查看当前系统cat /etc/redhat-release [root@nginx /]# cat /etc/redhat-release CentOS release 6.7 (Final) [root@nginx /]# b. 查看系统内核uname –r [root@nginx /]# uname -r 2.6.32-573.el6.x86_64 [roo…

在nginx的配置文件nginx.conf中,我们在配置server的时候,会配置一下location指令,这个location指令是提供给用户来配置对于符合指令的http请求,采用该指令内部的处理方式.这里面分成两步 第一步:nginx系统分析用户定义nginx.conf中server的location,将配置信息保存在内存里面,保存的数据结构方式可以参考前面第五部分说的. location ~ \.php$ { root html; fastcgi_pass ; fastcgi_index…

1. Location 的生成 location 的生成大致有三种: 由 location 指令直接生成 命令 location:仅用于 server 内部跳转,如 rewrite 就是命名 location,命令 location 不能包含在其他 location 里. location @rewrite { rewrite ~ /wiki/search(.*)$ /search.php?serach=$1 last; } 未命名 location:由 limit_except 和 if 等指…

location模块 Nginx location location 指令的作用是根据用户请求的URI来执行不同的应用,URI就是根据用户请求到的网址URL进行匹配,匹配成功了进行相关的操作. location语法 下面是官网的语法结构: Syntax:    location [ = | ~ | ~* | ^~ ] uri { ... } location @name { ... } Default:   — Context:   server, location 官网解释翻译和理解 下面会结…

nginx成为非常流行的代理服务软件,最根本的原因也许是在于其强悍性能.但还有一些必要的条件,比如功能的完整,配置的易用,能够解决各种各样的实际需求问题,这些是一个好的软件的必备特性. 那么,今天我们就来看看nginx配置的部分原则和解析原理吧.我们只做location部分的细节解析,但其他配置道理基本相通,推一及二即可. 1. nginx配置的基本原则 nginx是支持高度配置化的,那么也许就会涉及许多部分的配置,要如何协调好这些配置,是个问题.比如是否将配置定义一个个独立的文件,或者其他.…

############1   迁移数据库的集中方法 三.相关技术 迁移方式 优势 不足1 Export and import • 对数据库版本,以及系统平台没有要求 • 不支持并发,速度慢• 停机时间长 2 Oracle Data Pump • 多进程并发 • 要求10g以后的版本• 适合中型数据库 • 不支持XML和spatial数据类型 3 Transportable tablespace (TTS) database •快速,适合大型数据库 • 要求10g以后的版本• 可以跨平台,但是要…

11G - Reduce Transportable Tablespace Downtime using Cross Platform Incremental Backup (Doc ID 1389592.1) APPLIES TO: Oracle Database Cloud Exadata Service - Version N/A and laterOracle Database Cloud Service - Version N/A and laterOracle Database -…

Return value/code Description 0x00030200 STG_S_CONVERTED The underlying file was converted to compound file format. 0x00030201 STG_S_BLOCK The storage operation should block until more data is available. 0x00030202 STG_S_RETRYNOW The storage operatio…

新版用友u8.70下载地址:http://ftp.shangyuchem.com/应用软件/用友ERP-U8管理软件(8.70版).rar 准备好安装环境,因为需要SQLSERVER和IIS支持,而个人的电脑又是VISTA basic版本的,处理起来比较麻烦,所以我先安装了(VirtualPC)虚拟机,在虚拟机上配置WIN2003+SP1+IIS6.0+SQLSERVER2000+补丁 然后开始安装,选择全部安装(我这里虚拟机既是客户端也是服务器端,大家根据自己的需要选择,如果只需要客户端的话就…

文章地址  http://developer.android.com/training/articles/perf-jni.html JNI Tips JNI is the Java Native Interface. It defines a way for managed code (written in the Java programming language) to interact with native code (written in C/C++). It's vendor-ne…

Backbone Bockbone 总览 Backbone 与 MVC 模式:解决某一类问题的通用方案 - 套路 MVC:一种架构模式,解耦代码,分离关注点 M(Model) - 数据模型 V(View) - 表现视图 C(Controller) - 控制器 Backbone 与 SPA 传统web应用与 SPA 的区别: 状态概念代替了页面概念 http://www.example.com/page1 http://www.example.com/page2 http://www.exampl…

//2014.11// Backbone.js 1.0.0 // (c) 2010-2013 Jeremy Ashkenas, DocumentCloud Inc. // Backbone may be freely distributed under the MIT license. // For all details and documentation: // http://backbonejs.org (function() { // Initial Setup // ---------…

https://dzone.com/refcardz/csharp C#Development 13 Things Every C# Developer Should Know Written by Jon JarboeSenior Technical Manager, Coverity Gives 13 useful tips and references for using C#, a simple, modern, general purpose, object-oriented, mul…

JNI Tips In this document JavaVM and JNIEnv Threads jclass, jmethodID, and jfieldID Local and Global References UTF-8 and UTF-16 Strings Primitive Arrays Region Calls Exceptions Extended Checking Native Libraries 64-bit Considerations Unsupported Fea…

Original article Built-in arrays Javascript Arrays(Javascript only) ArrayLists Hashtables Generic Lists Generic Dictionaries 2D Arrays All types of collections share a few common features: You can fill them with objects, and read back the values that…

内容源自Delphi XE5 UPDATE 2官方帮助<Delphi Reference>,本人水平有限,欢迎各位高人修正相关错误! 也欢迎各位加入到Delphi学习资料汉化中来,有兴趣者可QQ:34484690@qq.com 3       Unit References and the Uses Clause 3       单元引用和uses 子句 A uses clause lists units used by the program, library, or unit in whi…

config_spec Rules for selecting versions of elements to appear in a view APPLICABILITY Product Command type ClearCase data structure ClearCase LT data structure Platform UNIX Windows SYNOPSIS Standard rule: scope pattern version-selector [ optional-c…

In this Document Purpose Details   Scenario 1: Testing the basic item import with minimum columns populated   Scenario 2: To import items and use item templates   Scenario 3: To import items and material cost associated to it.   Scenario 4: To import…

<!DOCTYPE html> <html lang="en"> <head> <title>Backbone.js, Require.js, and jQuery Mobile</title> <meta name="description" content=""/> <meta name="viewport" content="widt…

learning python,5e中讲到.Python的函数参数传递机制是对象引用. Arguments are passed by assignment (object reference). In Python, argumentsare passed to functions by assignment (which, as we’ve learned, means by objectreference). As you’ll see, in Python’s model the cal…

Backbone 作者在源码中做了很好的注释,这里只是锦上添花,补充一些个人的理解而已. // Backbone.js 1.2.3 // (c) 2010-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors // Backbone may be freely distributed under the MIT license. // For all details and documentation:…

Before starting with best practices tobe followed, it is good to have clear understanding of how memory is managed (allocation, de-allocation). So, let us start with memory management first. Managed Heap and Garbage Collection Overview Memory Allocat…

http://www.cs.utsa.edu/~wagner/CS2213/swap/swap.html 原地址 Parameters, by value and by reference: Both C and Java use only parameters that pass by value, which means that the value of the actual parameter is used to initialize the formal parameter. For…

方法注册好后要经过哪些路 Android一个异常捕获项目 https://github.com/xroche/coffeecatch coffeecatch CoffeeCatch, a tiny native POSIX signal catcher (especially useful for JNI code on Android/Dalvik, but it can be used in non-Java projects) It allows to "gracefully"…

// Backbone.js 1.0.0 // (c) 2010-2013 Jeremy Ashkenas, DocumentCloud Inc. // Backbone may be freely distributed under the MIT license. // For all details and documentation: // http://backbonejs.org /* * 注释 一只柯楠 */ (function(){ // Initial Setup // ---…

JNI Tips 1.In this document JavaVM and JNIEnv Threads jclass, jmethodID, and jfieldID Local and Global References UTF-8 and UTF-16 Strings Primitive Arrays Region Calls Exceptions Extended Checking Native Libraries 64-bit Considerations Unsupported F…