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;middot;middot; It's not occupied, I've checked it. middot;middot;middot;middot;middot;middot; good and bad, sometimes for a couple of hours is OK, Sometimes the problem occurs after a two-minute reboot middot;middot;middot;middot;middot;Or a bad network? Software conflicts? It's not occupied, I've checked it. middot;middot;middot;middot;middot;middot; good and bad, sometimes for a couple of hours is OK, Sometimes the problem occurs after a two-minute reboot middot;middot;middot;middot;middot;Or

Desugar Scala (17) -- Option and for, and what happens in your mind The for keyword in Scala is very interesting. It can be used to write multi-layer nested for loop into one layer. For example: 1 for(i The result of executing this line of code is as follows: 12345678910111213141516171819202122 1 1 11 1 21 1 31 1 41 1 51 1 61 1 71 1 81 1 91 1 101 2 11 2 21 2 31 2 41 2 51 2 61

encoding is the process of turning a string into a byte, and decoding is the process of turning a byte into a string according to the corresponding encoding . a Good article: Understanding coding from the principle-what exactly is coding? What is decoding? What is a byte stream? The following picture shows the conversion process of string encoding in Ja

When we enter www.cnblogs.com in the address bar of the browser, and then enter, enter to see what happened to the page?Domain name resolution--Initiates a TCP 3 handshake--initiates an HTTP request after the TCP connection is established--the server responds to the HTTP request, the browser gets the HTML code--the browser parses the HTML code, and requests the resources in the HTML code (such as JS, CSS , pictures, etc.)-browser renders the page to t

able to get to the writing session to obtain the user information7. After verification, access to the/saiku/rest/saiku/user name/discover interface to obtain a user's cube and a series of informationNote: The LoginForm login window is always created if the user's SessionID information is not available through getsessionTwo choices and what happens when you switch the cubewith browser tracking, it is found

The HTML code of a picture is escaped when it is inserted into MySQL, as follows What causes this escape?How to avoid this situation.When this happens, use Html_entity_decode () to turn the following, or the HTML will be output as a string. Reply content: The HTML code of a picture is escaped when it is inserted into MySQL, as follows What causes this esca

What Happens When A Tablespace/Database Is Kept In Begin Backup Mode (Doc ID 469950.1), tablespace469950.1Goal This document explains in detail about what happens when a tablespace/datafile is kept in hot backup/begin backup mode.Solution To performOnline/hot backupWe have to put the tablespace in begin backup mode fol

Today's whim, wondering: After a bindservice B in Android, what happens if A or B is killed?1. Kill A, no doubt it should be: B won't be stopped. 2. Kill B, what's going to happen? A'll receive onservicedisconnected call back. And A would reconnect B? Or A would re-bindservice B? Or A would receive onserviceconnected B, if B is restarted? After testing, this is the right one.

Enter the URL in the browser what happens when you press the ENTER key[1] Parsing URLs[2] DNS queries, resolving domain names, resolving domain names to IP addresses[3] ARP broadcast, resolving MAC addresses based on IP address[4] respectively, from the application layer to the transport layer, the network layer and the data link layer are added to each layer of the head package for the package[5] After thr

: When the server receives a disconnected request, there may still be data not being sent, so the server sends a confirmation signal and then agrees to disconnect after all the data has been sent.After the fourth handshake, the host sends a confirmation signal and does not immediately disconnect, but waits for 2 message delivery cycles, because if the confirmation message of the fourth handshake is lost, the server will resend the third handshake's disconnected signal, and the server is aware th

Today's whim, what happens if the class name is the same as the object identifier declared by this class, and then it's tested. As follows:#include Normal compilation passes, and the result is normal. Think about this result is expected, because in the main function body in the beginning of the first encountered a, because the main local domain does not have a declaration, so continue to the outside of the

What happens in the middle of a program when Linux is running?There are two ways to solve the bin case.The first is the Nohup command.# Nohup Bash/usr/local/sbin/sleep.sh The above method generates a Nohup.out file in the current directory and appends the output to this file.The second method is the screen command# yum Install screen.x86_64-y# screenctrl+a, then press d[detached from 12185.pts-0.localhost][

If the transaction is completed, to its own server two authentication (server to user value-added operation), the customer service end suddenly broken network or Apple server connection is not what to do, and now do not find the perfect solution, now temporarily use this method:Transaction persists, saves the encrypted Base64 string locally, and automatically re-verifies each time the user logs on.When two authentication, the user's customer service e

to modify the runtime content, or call it a hot load, the default is not There will be a better reflection on the real machine. Spit on the trough for a moment:JAVA OSGI, rather than Erlang, requires someone to switch ideas, not something that is native, always awkward, and a patchwork of community or business companies is just a way to implement some of the enterprise features that object-oriented thermal loading does not have. Test the source code and download Just_test. 1 million c

application layer. Please refer to the article "Network Programming Explanation: TCP semi-open connection processing." If the network cable is disconnected for a short time, within the detection interval set by the so_keepalive, and the ends of this period, there are no networking operations for this long connection. When the network cable is connected, the TCP connection can be restored automatically, and then the normal operation will continue. If the network cable is disconnecte

as Web caching, connection pooling, loading strategy, encryption and decryption, proxy relay and so on are not mentioned. Even though the basic steps themselves have very complex sub-steps, TCP/IP, DNS, HTTP, HTML: Each one can be expanded into a huge topic, and the basis of the browser-operating system, compilers, hardware, etc. is more complex than a. Not the computer professional students read the above explanation completely do not understand is very normal, may ask why to make so complex,

help it handle browser requests. Below is a brief summary of these four classes:The HttpRequest class, which is a number of properties that represent the parameters of an HTTP request.The HttpResponse class, which provides methods and properties for responding to clients.The HttpContext class, which encapsulates objects of the HttpRequest class and the HttpResponse class, is designed to simplify server-side processing of HTTP parameters.The HttpApplication class is the play, and this class is u

Solitary threading Mode Symptoms Treatment and preventive measures Summarize Resources About the author The evaluation of the paper What happens when the main thread crashes while the other threads continue to run? Eric E. Allen (eallen@cs.rice.edu) PhD candidate, Rice University August 2001 In multithreaded code, it is common to use a single main thread that drives the actions that other threads

Screen orientation changes occur in many applications, but what happens when things change?Let's write an app to test it.Here's the code: http://download.csdn.net/detail/edwardwayne/8594291We wrote a few important stages of the Android life cycle oncreate,onresume,onstart,ondestory,onstop approach in mainactivityCalling the Toast method in it tells us that there are no triggers at these stages.In addition w

What happens if the Linux address is not ping?Problem: Today wrote a paid project, there is a class in the use of the HttpPost request, the address of the HTTP request is: Https://api.mch.weixin.qq.com/pay/unifiedorderFound in the normal use of the machine, in the Linux server log is returned java.net.UnknownHostException: api.mch.weixin.qq.comThe first thought is whether the server can normally access the