luminosity auto

Original works, reprint please indicate: http://blog.csdn.net/Xiejingfa/article/details/50469045 As anyone familiar with the scripting language knows, many scripting languages introduce "type auto inference" techniques: For example Python, you can declare variables directly, and type check at runtime. With the release of the C++11 standard, the C + + language also introduces the function of type automatic inference, which is the

Limitations of Innodb and Myisam storage engines on auto_crement: The auto-increment column in Innodb must be the index and the first column in the index. Otherwise, the following error will be reported: there can be only one column and it must be defined as a key; myISAM does not have this restriction. MyISAM adopts the table lock design, so you do not need to consider concurrency issues for self-growth; How auto_increment works in Innodb: A table co

Analysis of C ++ auto type specifiers When programming, you often need to assign the expression value to the variable, which requires you to clearly know the type of the expression when declaring the variable. However, it is not that easy to do this, and sometimes it cannot even be done at all. To solve this problem, the C ++ 11 standard has been introducedautoType specifier, which enables the compiler to analyze the type of the expression for us. D

of the missile head after the rotation. Depending on the angle of rotation, the rotation angle differs in different quadrant parameters, so we are divided into these four casesQuadrant3,4 quadrant, which rotates only plus or minus 0-180, so the 3,4 quadrant is the negative angleWe'll move him when we show the picture. screen.blit(missiled,(x1-width+(x1-C[0]),y1-height/2+(y1-C[1]))) Here (X1-WIDTH,Y1-HEIGHT/2) is actually in the (X1,Y1)So finally we add the relevant algorithm code,

configuration file; 3. Why use single-case, multiple-case: The single case, because there is no need to create a new object for each request, this is a waste of CPU and a waste of memory; is used in many cases to prevent concurrency problems, that is, a request changes the state of the object, At this point the object processes another request, and the previous request's change to the state of the object causes the object to handle the wrong handling of the other request; with Singleton and

-completion### after the installation is complete, review the BREW Info bash-completion### will output similar to the following ==>~/. Bash_profile: if [-F $ (brew--prefix)/etc/bash_completion ];then--prefix)/etc/Bash_ Completion fihomebrew's own bash completion script have been installed to /usr/local/etc/bash_ COMPLETION.DWill If...then ... That sentence added to ~/.bash_profile (if there is no file, create a new one)Restart the terminal, the above is the installation Bash-completion sec

1: Set the template for the comment:Download this template: Codetemplates.xmlSearch for Dangzhang, change it to your own name, saveOpen Eclipse/myeclipseSelect Window-->preferences-->java-->code-->code Templates Right Point import Select the template you have written. Import the XML file in2: Set up a formatted template:Format Template: Eclipse-formatter.xmlFormat Template Method Ditto, just not select Code Templates, but choose Formatter.3: Automatic format code when saving:Open Eclipse/myeclip

There are these lines in the/ETC/BASH.BASHRC.#enable Bash completion in interactive shells# if! Shopt-oq POSIX; Then# if [-f/usr/share/bash-completion/bash_completion]; Then# . /usr/share/bash-completion/bash_completion# elif [-f/etc/bash_completion]; Then# . /etc/bash_completion# fi# fiRemove comments#enable Bash completion in interactive shellsif! Shopt-oq POSIX; Thenif [-f/usr/share/bash-completion/bash_completion]; Then. /usr/share/bash-completion/bash_completionelif [-f/etc/bash_completion]

Original: http://www.xuebuyuan.com/730127.htmlUse of iptables see Http://wiki.ubuntu.org.cn/IptablesHowToAfter the iptables configuration is complete, the rules are automatically applied immediately, but after the machine restarts, the rules are lostUnder Ubuntu, you can save Iptables settings by following these steps, and enable automatic loading1, iptables after the configuration is done manually saveExecute Iptables-save >/etc/iptables.up.rules, save the current configuration in Iptables.up.r

After Windows is powered on, the digital keypad light is on, but when you switch to the Ubuntu System login username and password, if you set the number, you have to open the number pad NumLock key, and then entered, very inconvenient.First, you need to install a small software that performs the following in the terminal:sudo apt-get install NumlockxThen edit:sudo gedit/usr/share/lightdm/lightdm.conf.d/50-unity-greeter.confLast added: Greeter-setup-script=/usr/bin/numlockx onRestart or logout. W

// requires root privilegesThen go to the directory where you are developing the source code for compiling the project, executing:$ ctags-rwill generate a tags file, using vim to open a file in your project, such as Main.cThen execute it in vim:　　　　: Set Tags=tags directory/tagsThis will add tags to the vim. If you have trouble, you can put this sentence into the VIMRC mentioned above.At this point you can CTRL +] and Ctrl+t hi skin.Not to be continued.Reference website:http://blog.csdn.net/n

If you want to configure in eclipse only, just window->preference->myeclipse->file and Eiditor->xml->xml in the menu bar catalog- >add Add:Location where the Struts-2.3.dtd is selected as shown inKey type check URIKey: There are "-//apache software foundation//dtd Struts Configuration 2.3//en""Http://struts.apache.org/dtds/struts-2.3.dtd" > select http://struts.apache.org/dtds/struts-2.3.dtd toIn Eclispe after the configuration is saved, when you write the Struts.xml file, you can automatically

= "/home/server1image/" dst2= "/home/server2image/" /usr/bin/inotifywait -mrq-ecreate,delete,modify,move $src 2|whilereadline;do/ usr/bin/unison-batch $src 2ssh://$ip 2/$dst 2echo-n "$line " >> /var/log/inotify.logecho ' date|cut-d ' ' -f1-4 ' >>/var/ LOG/INOTIFY.LOGDONE2) server2 Create script unison1.sh:#/bin/baship1= "192.168.1.11" src1= "/home/server2image/" dst1= " /home/server1image/"/usr/bin/inotifywait-mrq-ecreate,delete,modify,move $src 1 |whilereadline;do/usr/bin/unison-batch $src 1ss

I am the eclipse turned around, IntelliJ idea can be set into Eclipse shortcut key style, may be a little different, according to the needs of their own configuration on the line. Set the shortcut key, open the settings (ctrl+alt+s) Search Keymap, select Eclipse in Keymaps.Using Eclipse's Code completion shortcut key alt+/has been accustomed to, but inteljidea this shortcut key combination has no effect, then we can modify it, press Ctrl+alt+s to open the settings interfaceThen select Eclipse in

, version) that we defined in configure.in. Make Distcheck generates and tests the release package to determine the correctness of the release package. This will automatically unpack the package file, execute the Configure command, and execute make to confirm that the compilation does not appear to be wrong, and that the package is ready to be released.Helloworld-1.0.tar.gz is a ready for distribution make distclean similar to do clean, but it also removes all configure generated files, includin

Edit/etc/rc.d/rc.localAs follows:Export java_home=/usr/java/jdk1.7.0_71Export classpath=.:/ Usr/java/jdk1.7.0_71/lib/dt.jar:/usr/java/jdk1.7.0_71/lib/tools.jarExport Path=/usr/java/jdk1.7.0_71/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/binExport catalina_home_1=/usr/local/tomcat_1_18001Export catalina_home_2=/usr/local/tomcat_2_18002Export catalina_home_3=/usr/local/tomcat_3_18003Export catalina_home_4=/usr/local/tomcat_4_18004/usr/local/tomcat_1_18001/bin/startup.sh/

C # moved to Android, not very familiar with Eclipse, it took a while to find that the original set of embarrassingWindow->preferences->java->editor->content AssistAnd then the lower right corner auto activation triggers for Java inside instead. ABCDEFGHIJKLMNOPQRSTUVWXYZ (, ABCDEFGHIJKLMNOPQRSTUVWXYZXML settingsOpen Eclipse->window->preferences->xml->xml files->editor->content Assist,Prompt where these characters is inserted:

);} catch (Exception e) {e.printstacktrace ();} return filestatics;} public static Templatehashmodel Gethelperclass (String clazz) {Templatehashmodel usestaticpackage = Ftlutil.usestaticpackage (clazz); return usestaticpackage;}}Freemarker Code:Deficiencies:1, temporarily only support the generation of child node number, does not support sibling node number2, the generation of a numbered object requires more dependence, slightly cumbersome, but only in accordance with the current needsJava imple

') file_object.write (Img.read ()) elifcount== 2:file_object=open (' Img/186-1week-cpuload.png ', 'WB ') file_object.write (Img.read ()) elifcount==3: file_object=open (' img/186-1week-network.png ', ' WB ') file_object.write (Img.read ()) elifcount==4: file_object=open (' img/186-1week-memory.png ', ' WB ') file_object.write (Img.read ()) defaddimg (Src,imgid): #添加图片函数, parameter 1: Picture path, Parameter 2: Picture Idfp=open (SRC, ' RB ') #打开文件 msgimage=mimeimage (Fp.read ()) #创建MIME

Linux will automatically start some services each time you boot, if you want to optimize the default boot system services, you can use the following two tools.1:NTSYSV command2:chkconfig commandOne, Ntsysv commandUse the NYSYSV command alone, only for system services under the current RunLevel, and add the--level option to optimize system services at other levels.Use the command NTSYSV--level 35//Show all services that start automatically at run Level 3, 5650) this.width=650; "src=" http://s4.51