Posts

mysql - Why the rows returns by "explain" is not equal to count()? -

mysql & gt; तालिका से गिनती (*) चुनें जहां relation_title = 'xxxxxxxxx'; + ---------- + | गिनती (*) | + ---------- + | 12 9 1 9 58 | + ---------- + mysql & gt; तालिका से * चयन करें जहां relation_title = 'xxxxxxxxx' चुनें; + ---- + ------------- + --------- + - | आईडी | Select_type | पंक्तियाँ | + ---- + ------------- + --------- + - | 1 | सरल | 1274785 | + ---- + ------------- + --------- + - मुझे लगता है कि "चुनें से चुनें * तालिका जहां relation_title = 'xxxxxxxxx'; " इंडेक्स द्वारा relation_title = 'xxxxxxxxx' की पंक्तियां देता है लेकिन यह सही संख्या से छोटा है। यह दिखा रहा है कि आपके परिणाम प्राप्त करने के लिए यह कितनी पंक्तियों से गुजर रहा है । गलत डेटा का कारण यह है कि EXPLAIN सटीक नहीं है, यह आपकी तालिका के बारे में संग्रहीत जानकारी के आधार पर आपके डेटा के बारे में अनुमान लगाता है। यह बहुत उपयोगी जानकारी है, उदाहरण के लिए कई तालिकाओं में जोन कर रहे हैं और आप यह सुनिश्चित करना चाहते हैं कि आप प्रत्येक पंक्ति के लिए...

ajax - How does an XMLHttpRequest response get routed to the right browser-callback? -

I have created a webpage which uses Ajax to update some values ​​without reloading the page. I am using an XMLHttpRequest object to send a POST request, and I assign the callback function when the response arrives, and it works fine. But ... how does the browser in the world know that some data is coming from some IPs: should the port be sent to this particular callback function? I mean, in the worst case, if I have Firefox and IE then make some post requests from the same server almost the same time, and even before the poster requests reach the previous people, how do the data come Is being routed for the correct callback function ?? Each of the HTTP requests made on a separate TCP connection is only for the browser to return to that connection. Waits, then invokes your callback function. At the lower level, TCP implementation on your OS will be some lookup table mapping source port for each socket (i.e. connections) to open a socket using a different "source port...

How do I return a string array in c# and use it in unmanaged c++? -

Can anyone tell me how to return a string array by one method and use it in C #? Suppose I have to return the array in {one, two, ..... ten} and c ++, I have to display this array on the console and do some action. It did not make me self, but on an estimate: to create an assembly in C # For Csharpassembly.dll is called with the following class using the system; Namespace CesarPadaccations {public class} CSharpClass {public static string [GetStrings ({return new string} ["1", "2", "3"})); }}} But in your case create an assembly that creates this assembly in C # and HAA MC ++ program context and call it: #include "stdafx.h" #using & lt; Mscorlib.dll & gt; # Using "csharpassembly.dll" using the namespace system; Namespace Csharpassembly using __gc class {public: static zero} ProcessCShaperStrings () {array ^ stringArray = CSharpClass :: GetStrings (); Console :: lineline (string array [0]); ... // e.t...

xml - Rewriting Binary Streams using Java -

I am studying NATI and Mina but it is the best way to rewrite the binary stream. For example, I would like to create a proxy that will allow for further replacement with XML. Examples appreciated. I think you are thinking very little at one level. XML is not so "binary" because it is an abstract on binary if you want to convert the XML snippet into your line, you have to hit the payload portion of the packet and see the patterns of XML. Byte is used in a regular way after rebuilding temporarily. Once you have this search and match what you want, you can change what you want to change and send it again. The hard part of this is that before you leave your machine you need to cache some input so that you can search for the beginning and the end that you are looking for. Is it difficult that often it is, you do not know that "beginning" and "end" of data payload has been formed.

What is the lifecycle of an IIS-hosted (http) WCF service? -

I have a dependency injection container setup in my application and I am thinking that whenever WCF service requests are disabled in Is going to be. Can anyone explain to me, hosted an http / IIS WCF service, what is the lifecycle of the service? If I can understand it, then I can make an educated decision on where the container is stored, immediately, destroyed, etc. If your instancecontextmode is percall , the service The class will be created from scratch for each incoming request, and after that its work will be executed. If your InstantNext Modes is per session , the service class will be created and a customer will have a session duration (or an "inactivity timeout If your InstanceContextMode is Single (Singleton), then the service class will be created when the first request will be in and will remain in memory unless the requests Do not come in, unless there is no error and there is no inactivity. Then, you have it! Of course, compatibility mode ...

c++ - compilation error while #import tlb file in COM automation -

I am trying to include an application tlb file in the #VC ++ project. After compilation errors, #import "CANoe.tlb" in my project source file - unknown character '0x1' Syntax Error: missing ';' Before the identifier 'A' Missing type specifier int assumed. Note: C ++ does not support default-int '{': missing function headers (formal style list?) Please suggest, if I I am doing something wrong. In addition, is there a way to verify the .tlb file content and resolve these errors, is it possible to repair the TLB file? If so, how do I create an updated tlb Thank you in advance My The first thought was that you are working with a file that is not TLB or at least corrupt. I will try TLB at Olevew. With this you should check a quick conscience that the TLB is valid or not valid.

Iterating through an enumeration in Silverlight? -

In the Net in iterate through the enumeration using System.Enum It is possible or System.Enum.GetValues ​​(typeF (MyEnum)) P > In Silverlight 3, however, Enum.GetNames and Enum.GetValues ​​are not defined Do anyone know any alternate? Or perhaps using robust linq, like this: public stable t [] GetEnumValues ​​& lt; T & gt; () {Var type = typef (t); If (! Type.IsEnum) leave the new logic exception ("type" "+ type .name +" 'is not an enum'); Return (in the field in the field.Getfield (compulsive PLAZ.Public | binding flag.static) where field.Isilateral Selection (T) field.Gate value (empty)) .ORA (); } Public stable string [] GetEnumStrings & lt; T & gt; () {Var type = typef (t); If (! Type.IsEnum) leave the new logic exception ("type" "+ type .name +" 'is not an enum'); Return (by type in field.Getfield (BindingFlag.Public | Compulsive Flags.Static) where field. Choose ISILayer Field .name...