paas explained

In the previous essay http://www.cnblogs.com/chenguanai/p/6883401.html, has already understood the picture upload preview and the clipping function; so this time, look at the imgareaselect cutting function ~ ~ ~sometimes, when we cut an area, there will be a large middle and small three heads show ~ ~ ~ that is, as shown, when the right of the original selection, the left side will display the big small three pictures, easy to choose ~ ~ ~First step: introduce the plugin and JS package firstStep

sentence compilation does not pass Final New StringBuffer ("111"); a.append ("222"); // compiled byAs you can see, final is valid only for the reference "value" (that is, the memory address), which forces the reference to point only to the object that was initially pointed to, and changes its point to cause a compile-time error. Final is not responsible for the change in the object it points to.Summarize　　A reference to the local variable data and objects (String, array, object, and so on) that

availableMonitoring point B unavailable available availableWhether the fault is no no noFault duration 2 minutes 0 minutes 0 minutes 0 minutes 0 minutesNote:Fault definition: Every monitoring, all monitoring points fault is recorded as the project failure.Fault Duration: Each time the monitoring result is a fault, the length of the fault is added to the length of the monitoring frequency.++++++++++++++++++ Frame compositionThe application schema diagram has a maximum of five layers and is fixed

4x6=24 4x6=24 4x6=24---note---if (fabs (z) >1.0) fabs=float abs (absolute value) strcpy (A, a) copy B at the beginning address to a "see 3."---Note---1.int n=0;while (n++N=4while (n++Performed 3 times, n=42.Switch (a){Case 0:a=a+b;Case 1:a=b+c;Case 2:c=c+d; Break}In the switch loop, if Case1 Case2 does not break then the case 1 and CASE2 are executed sequentially until a break is encountered and jumps out3.Char a[7]= "abcdef";Char b[4]= "ABC";strcpy (A, b); Char a[7]= "abc[]ef[" [] denotes a spa

LinearLayout, you want to put the button on the left, right and other positions can be set by this property. Take button For example, android:layout_gravity= "right" button onAndroid:layout_alignparentrightAligns the right end of the current control with the right end of the parent control. This property value can only be true or FALSE, which is false by default.Android:scaletype:Android:scaletype is a size that controls how the picture resized/moved to the ImageView. The meaning difference of

: The above code is best for one character, because Java_home has limited the path to your JDK, and each version of Java JDK should be made up of these things.③, after the previous step is determined, then "new":"Variable name": ClassPath"Variable value":.; %java_home%\bin;%java_home%\lib\dt.jar;%java_home%\lib\tools.jarNote: The above code is best also a character unchanged paste up, "variable value" the most front.; Don't miss out.After completing the three steps above, the configuration of th

management programTomcat provides a hypervisor: Manager for managing Web applications deployed to the Tomcat server. The manager Web application is included in the Tomcat installation package. To access the Manager Web application, you need to add an account with administrator privileges, edit the%catalina_home%\conf\tomcat-users.xml file, and add the manager role to the [HTML]View Plaincopy print? xml version= '1.0 ' encoding=' utf-8 '?> tomcat-users> role rolename="Manager-gui"

as epoll_ctl (EPOLLFD, Epoll_ctl_add, Socket, epollin); // register buffer non-empty event with data inflow Epoll_ctl (EPOLLFD, Epoll_ctl_del, Socket, epollout); // Register buffer is not full event, that is, the stream can be written to epoll_wait (EPOLLFD,...) Wait until the registered event occurs (note: When a buffer full or buffer is empty for a non-blocking stream, write/read returns1and sets Errno=eagain. Epoll only cares about buffer non-full and buffer non-empty events). The code

both ends of the link to previously agreed Valu Es. The receiver looks at the voltage in the These times; If it sees a logic high, it records a binary digit 1, or a 0 if the line was ' low ', or 0V. The receiver checks half between the start and the end of the pulse to ensure it doesn ' t mis-read the voltage on the L ine during the brief intervals while the voltage is rising or falling.If the devices has agreed to use a ' parity bit ' for rudimentary error-checking, that's calculated and sent

version. As in my Linux system can be compiled with the following command:cdqt#x2212;embedded#x2212;linux#x2212;commercial#x2212;4.4.1/tools/qconfig">CDQT−EMBEDDED−LINUX−COMMERCIAl− 4.4.1/tool / Qco nf ig Cdqt−embedded−linux−commercial−4.4.1/tools/qconfig/usr/local/trolltech/qt-4.4.3/bin/qmake$ makeRun after compilation succeeds./qconfig, initial to open qfeatures.txt. Qconfig reads the file to generate a tree graph that clearly shows the dependencies between the feature. As shown, if you

configuration: Pconn_timeout 1 minutePersistent_request_timeoutOfficial explanation: Long connection waits for the next request to arrive time-outApplication Scenario: Squid establishes a long connection with the client, the current request processing ends, and the time-out waiting for the next request to arrive.Dns_timeoutOfficial explanation: DNS Query time-outDefault configuration: Dns_timeout 2 minutesPositive_dns_ttlOfficial explanation: The correct DNS cache expiration timeApplicable scen

left panel of the projectProject Settings->projectProject Settings-ModulesSources PanelPaths PanelDependencies PanelProject Settings-> LibrariesProject Settings-> FacetsProject Settings-Artifactsabout adding a dependency packageYou can add a rack package to the Libraries tab, or a rack package in the corresponding module. The former can be set up together with the package and the individual name, to facilitate their own management of the rack package."IntelliJ idea" Project Structure

The Command Pattern: Encapsulates a request as an object, thereby letting-parameterize other objects with different requests, queue or log Requests, and support undoable operations 1 Public InterfaceCommand {2 Public voidexecute ();3 }4 5 Public classLightoncommandImplementsCommand {6 Light light ;7 8 PublicLightoncommand (light) {9 This. Light =Light ;Ten } One A Public voidExecute () { - Light.on (); - } the } - - Public classRemotecontrol { - Command slot; +

strategypattern, the responsibility for selecting the particularImplementation to use are done by the Client object and are given to theContext of the strategy pattern. Coupling of strategy with contextThe strategy pattern requires that the algorithms that are encapsulated must be outside the class (Context) in which they are used. That is to say that it either passes the information strategy needs to it (strategy), or it is obtained in other ways. Disadvantages:Have to crea

Recently when using MyBatis as a crud, just put the configuration files and mapping files to make the test can get sqlsessionfactory when there is caused by:java.lang.ClassNotFoundException:Cannot Find Class:usermapSearch and search on the Internet finally found the error, is their own mapping file configuration problems, the query returned is a collection, then its parameters is resultmap= "" and I wrote with alt+/Resulttype, so the program has not been normal operation, has been error ...650)

states of the TFTP client: statusDescriptionState_rrqIssue a read request pending approvalState_dataReceiving dataState_too_largeFile is too largeState_bad_magicBad magic numberState_oackReceive Oack FramesPackage TypeThere are 6 types of packets delivered using TFTP: typeDescriptionTftp_rrqRequest Read FileTftp_wrqRequest Write FileTftp_dataData packageTftp_ackConfirm PackageTftp_errorPackage with error messageTftp_oackOption acknowledge actively emits a oack frame when the server times out wi

$ git CherrypickUsing a new command-----Picking instructions (git cherry-pick) to commit on the new branch "replayPicking instructions----git cherry-pick The implication is to choose from a multitude of submissions the applicationThe current work branch. The command needs to provide a commit ID as an argument. The procedure is equivalent to submitting theExported as a patch file and then replayed on the current head, forming five-way content or submitting a consistent commit.Some common commands

release of the C6 and then use the C4 ', the other people will therefore feedback the dual history to the shared backbone, Thus confusing everyone's audiovisual. ）。If you think of a rebase as a means of cleaning up the commit history before push, and just the ones that have not yet been made public, there's no problem . A frustrating problem arises if the submitted objects that have already been exposed have been developed and others have been followed up based on those submissions.3.7 SummaryR

address error to wait for the cache to clear and then re-resolve to obtain the address. General cache cleanup is about 2 hours.3, the DNS service access relationship, the client Access DNS server is recursive, the DNS server must give the client a result. While the DNS server accesses each domain server for the iteration (Die Dai) by each domain server to give the next hop address, and then by the DNS server to access the domain server address and then resolve the final destination host IP addr

provides tools to help you combine multiple modules into one7.parsetoolapplication, contains the LALR-1 generation parser YECC (similar to YACC), lexical analysis generator Leex8.reltool Release Management tool that provides graphical front end and back end hooks that can be used to build common systems9.runtime_toolsapplication, offers some very useful tools, dyntrace (Dynamic Trace), System_information (System probe), DBG ( Text-based trace, which contains the user-friendly trace bifs), etc.