instance = Null;public DBHelper (context context) {Super (context, database_name, NULL, DATABASE_VE rsion);} Public synchronized static DBHelper getinstance (context context) {if (instance = = null) {instance = new DBHelper (context); }return instance;} @Overridepublic void OnCreate (Sqlitedatabase db) {Db.execsql (SQL. Create_table_favorite);//If it is not the first version installed, perform a database upgrade directly//Do not modify the value of F
running on the same host
monitor VIP 20s:20s #定义vip的监控, monitor every 20s, delay 20s
monitor MARIADB 20s:20s
commit #保存配置 and make it effectiveHaproxy Cluster Service configurationHaproxy cluster configuration using PCS,PCS is not an interactive management interface, we can directly enter Management command managementConfiguration of the Node1Systemctl start Pcsd.service #开启pcsd进程
systemctl enable Haproxy.service #设置haproxy开机启动, This is the Pacemaker control SYSTEMD Management Service fundament
Compare numbers version1 and Version2.If Version1 > Version2 return 1, if Version1 Assume that the version strings is non-empty and contain only digits and the. Character.The. Character does not represent a decimal point and was used to separate number sequences.For instance, 2.5 are not "both and a half" or "half to version three", it is the fifth Second-level revision of the SEC Ond first-level revision.Here are an example of version numbers ordering:0.1 Credits:Special thanks to @ts for addin
recently someone in the Tornado Mail group was discussing using Tornado as a proxy, and the application scenario mentioned by the owner was very similar to the scene I met, and I did some sorting and simplification of the original post code, the source code is as follows:
?
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26-27--28 29---30 31--32 33 34 35 36 37 38-39 40 41 42 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
boot from Solaris as shown in Belo W image.After starting the Solaris Boot process, you'll see the following message displayed on your screen showing the release ve Rsion of SunOS.2) ZFS Root File SystemHere's you'll be asked to choose from the available options on what's want to do. So, choose the option 4 as shown on the below image to start the installation of the ZFS root file system.3) Keyboard ConfigurationsChoose your keyboard layout from the
Python 2.6-october 1, 2008Python 2.6.1-october 1, 2008Python 2.6.6-october 1, 2008Python 3.0-december 3, 2008Python 2.7-july 3, #目前业内主流使用的工业版本依然是2.7print "Hello World" #in 2.xPrint ("Hello World") #in 3.xIn Summary:python 2.x are legacy, Python 3.x is the present and future of the languageSummary: Python2.x is the legacy, python3.x is now and the future of the languagePython 3.0 was released released in 2008. The final 2.x version 2.7 release came out in mid-2010,With a statement declaration of
: __pthread_mutex_lock_full:assertion ' (-(e))!= 3 | | !robust ' failed.
Aborted (core dumped)
randoms@nowhere:~/ramdisk$ ls
2.bag core KeyFrameTrajectory.txt Orb.log
You can see that a core file was created after the program crashed, and the following instructions were entered at the end to start debugging
randoms@nowhere:~/ramdisk$ Gdb/home/randoms/documents/ros/workspace/devel/lib/orb_slam2/mono Core
GDB's instruction format is GDB Exe_file_path Core_file_path
Wait for load to complete
G
different set of core classes.
Note This classes which implement the Java 2 SDK tools are in a separate archive from the bootstrap classes. The Tools archive is the SDK ' S/lib/tools.jar file. The development tools add this archive to the user class path when invoking the launcher. However, this augmented user class path are only used to execute the tool. The tools that process source code, javac and Javadoc, with the original class path, not the augmented ve
# defaults to using
the 1.9.3-p392 rbenv Shell 1.9.3-p392 # The current shell uses 1.9.3-p392, which sets a ' rbenv_ve Rsion ' environment variable
rbenv local jruby-1.7.3 # The current directory uses jruby-1.7.3 and generates a '. Rbenv-version ' file
Resolve MacOSX the method of compiling Ruby without entering Chinese in IRB
Install the homebrew readline, then enter the source directory, recompile the installation Readline.bundle
to view the network card information, you will see more than one called Bond0 network card.
centos5.5_ dual NIC bindingLinux Dual card binding implementation is to use two network card virtual to become a network card, the aggregation of equipment appears to be a separate Ethernet interface equipment, popular point is that two network cards have the same IP address and parallel link aggregation into a logical link work.The first thing to see is whether Linux supports BONDING,RHEL
It's actually a way to qualify custom annotations by @constraint.
@Constraint (Validatedby = xxxx.class)
Here's what I do. Java Custom Annotations code sample for pre and post parameter verification
Interested in this, please look good, learn well:
Package sonn.sonnannotation;
Import java.lang.annotation.Documented;
Import Java.lang.annotation.ElementType;
Import java.lang.annotation.Retention;
Import Java.lang.annotation.RetentionPolicy;
Import Java.lang.annotation.Target;
Import Javax
+ '. Py ' title = Title.lower () title = Title.replace (', ' _ ') if exists (title
): print "\na script with this name already exists." Exit (1) descrpt = Raw_input ("Enter a description:") name = Raw_input ("Enter your Name:") ver = raw_input ("Enter the VE
Rsion number: ") div = ' ======================================= ' filename = open (title, ' W ') date = strftime ("%y%m%d ") Filename.write (' #!/usr/bin/python ') filename.write (' \n#titl
version order. If version is not a specified, it is treated as the empty string. Therefore, Foo.war is treated as an earlier version than foo# #11. War and foo# #11. War would be treated as an earlier VE Rsion thanfoo# #2. War. If using a purely numerical versioning scheme it's recommended that zero padding are used so thatfoo# #002. War is treated a S an earlier version than foo# #011. War.
If you want to deploy a WAR file or a directory using a con
Database version: Ver 14.14 distrib 5.6.19, for Linux (x86_64) using Editline WrapperLinux versions: Linux version 2.6.32-279.el6.x86_64 ([email protected]s.org) (gcc ve rsion 4.4.6 20120305 (Red Hat 4.4.6-4) (GCC) ) #1 SMP Fri June 12:19:21 UTC 20 12The RPM installation method used.1, the official website download tar compress package, for Http://cdn.mysql.com/Downloads/MySQL-5.6/MySQL-5.6.19-1.linux_glibc2.5.x86_64.rpm-bundle.tar;2, unzip the downlo
MyBatis 3.3.1 supports the ability to bulk insert multi-line writeback self-increment IDs, see the support insert multiple rows and Write-back ID #547. Implementation Principle
The implementation principle is an SQL statement:
INSERT into TableName (column-a, [Column-b, ...])
VALUES (' value-1a ', [' value-1b ', ...]),
(' value-2a ', [' value-2b ', ...]),
The databases that support the above SQL syntax features are: DB2, SQL Server (since version 10.0-i.e.), PostgreSQL (since version 8.2), MySQ
= GetVersionFromQueryString (request) from QueryString; var newName = string. conc At (controllerName, "V", version); HttpControllerDescriptor versionedDescriptor; if (controllers. tryGetValue (newName, out versionedDescriptor) {return versionedDescriptor;} return descriptor;} return null;} // obtain the private string GetVersionFromQueryString (HttpRequestMessage request) from QueryString) {var query = HttpUtility. parseQueryString (request. requestUri. query); var version = query ["v"]; if (v
in the entire framework. "Pay", programmatically speaking, and theThis ethos is being repeated around Microsoft:nano Server (Windows Server) are so slim it's only have processes Runni Ng–including your application! In a similar vein, Azure have ' to the nearest minute ' billing on VMs.
This also allows easy side by side installation of different versions of the. NET framework in the same machine without ve Rsion Collision–or The
In the use of Web-iou test, accidentally found a test topology, about 20 devices, there are 6 devices can not save the configuration, save the time also appeared error, error content as follows:*jun 05:49:50.842:%sys-2-nv_bad_ptr:bad NVRAM pointer. NV Header values are, nv:0x0x10fad788 textbase:0x0xab736714. textsize:2542 magic:0xabcd. checksum:0xa495. System_ve rsion:3840. textptr:0x0xab737102 v1_ptr:0x0x0. priv:0x0xab737108-traceback= 97f35ebz 96fd5
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