getlasterror

Next, write some tips for the VC6 Watch window, which is very helpful to the debugging process. VC6 is old, and Microsoft doesn't seem to support it anymore, but there are still a lot of people using it. I am very fond of its compact (relatively vs20

In our program, there are always some configuration information needs to be saved, in order to complete the function of the program, the easiest way is to write this information in the INI file, the program is initialized to read again. The specific

You can use the PostThreadMessage function to communicate between threads: PostThreadMessage 's prototype is like this. BOOL PostThreadMessage (DWORD idthread,UINT MSG,WPARAM WPARAM,LPARAM LPARAM);PostThreadMessageCan be used for asynchronous

windows open serial port, read and write serial port, automatic identification serial port This serial port reads and writes asynchronously, namely the non-blocking mode reads and writes the serial port Serial name such as: "COM3", "COM4", "COM22"

Scan all processes of the system1#include 2#include 3#include 4 5 intScan ()6 {7HANDLE Hprocessshap =NULL;8PROCESSENTRY32 pe32 = {0};9Hprocessshap = CreateToolhelp32Snapshot (Th32cs_snapall,0);Ten One if(Hprocessshap = =Invalid_handle_value) A

1.redisRedis is fully open source free, complies with BSD protocol, advanced Key-value persistent products. It is commonly referred to as a data structure server, because the value can be a string (string), a hash (MAP), a list, a collection (sets),

Windows C + + waits for thread synchronization sample with each otherThread synchronization problems encountered in development can be abstracted into the following models:1, the main thread continues to execute the premise is that the child thread

CRS can be used as caching, in session caching, full-page caching, improving database query performance, and other scenarios have a significant advantage; CRS can also be used as a key-value store with high reliability of data that can generate

The server object provides methods and properties that are accessed on the server. Most of the methods and properties are provided as functionality of the utility. Grammar: Server.property|method Properties (property) The server object has only one

Reading and writing files is a job that every Windows software developer needs to do. It can be seen that this work is very important, after all, all kinds of data need to be preserved in order to make a variety of analysis, or through the network

The GlobalAlloc function is called to allocate a chunk of memory that returns the allocated memory handle.Call the GlobalLock function to lock a block of memory that takes a memory handle as a parameter and then returns a pointer to the locked block

First, make a list of several levels of writeconcern that throw exceptions: Writeconcern.none: No exceptions thrown writeconcern.normal: Only network error exceptions are thrown, no server error exception is available Writeconcern.safe : Throws a

[Refer to Coreseek Full-Text Search Server 2.0 (Sphinx 0.9.8) reference manual for details see http://www.coreseek.cn/docs/sphinx_doc_zhcn_0.9.pdf] function GetLastError ()Returns the most recent error description information in human readable

Sometimes, we need to run only one instance of our program, the author of their own procedures have such a situation, so I have to explore some. After a while, finally small harvest, do not dare to enjoy, in pole published for your reference. Since

How to view commands:1. Run Db.listcommands () in the shell2. Accessing the administrator interface in the browser: http://ipaddress:28017/_commandsThe following are the most frequently used commands in MongoDB, as follows:Command: BuildinfoFormat: {

No write has been do on this connectionThe problem arose for several days. Dozens of times a day in the log no write has beendo on this connection,So study for several days.The operation of the program is to throw GetLastError when a problem

Turn http://www.cnblogs.com/jackluo/p/4206385.htmlMongoDB is currently the best document-oriented, free, open-source NoSQL database. If you are preparing for a technical interview with MongoDB NoSQL database, you'd better take a look at the

MongoDB is currently the best document-oriented, free, open-source NoSQL database. If you are preparing for a technical interview with MongoDB NoSQL database, you'd better take a look at the following MongoDB NoSQL interview quiz. These MongoDB

See also: http://www.2cto.com/database/201501/370191.htmlBasic informationSpock:primary>db.serverstatus (){"Host": "h6.corp.yongche.org",//Host name"Version": "2.6.2",//mongodb version"Process": "Mongod",//mongodb process, mainly Mongod and MONGOs

Insert_api1, structureDb.collection.insert (, {writeconcern: , ordered: }) Name Type Description ? Document or Docuemnts Document Need to insert the data ? Writeconcern Document