Example

The correlation mapping is a complex mapping relationship in the mapping relationship, which has a pair of more than one or one pairs and many pairs of relationships. They are subdivided into one-way and two-way points. Let's introduce each of the following. One-way Onetoone one-way one-to-one is the simplest one in the relational mapping, simply that you can query the other party from the associated party, but not the reverse query. We use the following example to illustrate that the person entity class in Listing 1 and the address class in Listing 2 are one-way one-to-one relationships ...

Metacza is a versatile language for compiling c++++ Meta template programming languages and outputting them. It can be seamlessly integrated into C + + projects without Boost::mpl libraries, allowing different namespaces and passes to directly generate C + + header files by using preprocessor-invariant directives. Metacza 4 This version fixes the code, allowing gcc-4.7.0 to compile. Use example: Example※input:metacza output:c++ fib (n) = fib (...)

Copy (PHP3, PHP4) copy---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Copy file Syntax: int copy (string source, String dest) Description: Copies a file, returns true if it succeeds, or returns false. Example: <?php & ...

Array_flip (PHP4 >= 4.0b4) array_flip---&http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; Flip array All value syntax: Array array_flip (array trans); Description: This function returns an array of Flip (flip) order. Example: &l ...

Web2ldap is a web-based multifunctional LDAPv3 client with Python authoring. It can run on a standalone built-in http://www.aliyun.com/zixun/aggregation/17117.html ">web server or another support fastcgi (for example, Mod_ fastcgi Apache) Web server control. It supports the various LDAPv3 binding methods and a powerful built-in schema browser that supports H ...

Web2ldap is a web-based multifunctional LDAPv3 client with Python authoring. It can run on a standalone built-in http://www.aliyun.com/zixun/aggregation/17117.html ">web server or another support fastcgi (for example, Mod_ fastcgi Apache) Web server control. It supports the various LDAPv3 binding methods and a powerful built-in schema browser that supports H ...

Coccigrep is a C-language Unix command-line tool. It can be used to locate a code file for a given structure, or to use one of its properties to set up and test. Coccigrep 0.5 is the first release version. Example Demo: http://home.regit.org/software/coccigrep/Download Address: https://nodeload.github.com/regit/coccigrep/zipball/v0.5

View the current status of the Linux system, 11545.html "> We have three ways to query methods 1:who am I example: [Root@localhost/]# who am iroot&http://www.aliyun.com    /zixun/aggregation/37954.html ">nbsp; Pts/0  ...

Usage of tar volume compression and merging in Linux? For example per volume 500M tar split-volume compression: Tar Cvzpf-somedir | Split-d-B 500m (-D is not a split option, is the shell option to indicate the output of the tar command as a split input) tar multi-volume Merge: Cat x > mytarfile.tar.gz

Function: Mount command. Common parameters:-T prompt mount–t file type device Path example sometimes you can hang it without specifying it.

Function: Observe hard disk entity usage situation and split hard disk. Common parameter hints: Fdisk device into the hard disk partition mode. Example hard disk partitions with Fdisk/dev 1. Enter m to display all command columns. 2. The input P shows the hard disk partition situation. 3. Enter a to set the hard drive boot area. 4. Enter N to set a new hard disk partition. 4.1. Enter e hard disk as [extended] partition area (extend). 4.2. Input p hard disk to [main] partition area (primary) ...

Let's open the system terminal and directly enter LS in the directory to see what it outputs? The original LS command lists all the files and directories in the terminal's current directory. The names we see in blue are directories. Of course, all of these directories may also have subdirectories and files. We would like to know which directories and files are available under these directories and which can be displayed using the-R parameter. The LS command also has a number of parameters that allow for more detailed information. For example-1 parameters. It can make the files and directories within the directory show only one per line, I ...

Linux OS, is a computer operating system, the Linux operating system's kernel name is also "Linux." 　　The Linux operating system is also the most famous example of http://www.aliyun.com/zixun/aggregation/29607.html "> free software and open source code development." Simply put, Linux is a set of free to use and free to spread UNIX-like operating system, it is mainly used for the Intel x86 series CPU ...

Feh 1.15.1 This version fixes a section failure when clicked on a menu item after the 1.15 launch. Feh is a fast, lightweight image viewer that uses IMLIB2 development, uses command-line drivers to support multiple picture views, uses TrueType fonts to display file information, supports image scaling, network loading, and more. Download Address: http://feh.finalrewind.org/feh-1.15.1.tar.bz2 Debian Installation Example: Installing dependency packages: a ...

Time magazine made a very special list of contemporary inventions, and Luo listed 50 of the worst inventions of the age.　　This is a record of these seemingly good intentions, but the actual implementation of the extraordinary difference is incomparable, even the opposite effect of the idea. Segway, for example, was once seen as a landmark invention in transportation, but it was not as predictable as it was when it came on the market. and ignoring the consumer's hard to launch new Cola (Newcoke), because ignoring the consumer's feelings for the brand, just three months disappeared in the history of the torrent. There is no shortage of ...

Action Instant strategy game "Neuwirth hero" in May after the release of a group of loyal players. It is said that there will be a huge update this month.　　This update is so great that we can call it "Neuwirth Hero 2". Neuwirth hero Worthplaying has a preview of this update. The update includes some new features and improvements, one of which is the leisure mode.　　The leisure mode is very tolerant to the player, for example, the money will not be lost after hanging off. The update also includes a 3v3 map, fixed game pairing system, a makeup mall in the game, and parents playing ...

The latest news of September 29, "Guild Wars 2" role designer Kristen Perry in an interview revealed that they will be in the game to improve the role of the armor dyeing system. "We have made significant improvements to the dyeing system. In Guild Wars 2, players can stain the armor they wear, and we completely discard the monotonous physical coloring that the players were able to dye.　　"Kristen Perry said. "For example, you can get real metal color for armor, choose Gold, silver, copper, iron, different metal styles, fine ...

(Compile/Kitty fish) According to overseas media reports, the failure of the Final Fantasy 13 is alarming, and many of the creators involved in the development of this work seem to have suffered some kind of "mystical curse".　　In addition to the "Final Fantasy 13" project director Bird Hill and the executive producer North Tairiku Good fan is still working in Enix, respectively, as the art director of the game and background graphic design director, other members of the team did not seem to have a happy ending. For example, as a game arranger of the Bang Vortex and the role of art designer Chitanai, both of them after the end of the project chose to resign ...

Shanghai A-share market this week, B-share market and the small and medium-sized market have been rising continuously, the rally is very fierce, to remove the weak trend of the B-share market, the rest of the market has created a new high, in particular, Shenzhen, a breakthrough 11,200 point mark, from the beginning of the rally 5577.23 points Rose has exceeded 100%.　　In the absence of a full recovery in the context of the rise in the doubling is very rare, so the medium-term view of the market has been relatively limited, but in the short term, the market in the sentiment has been fully ignited, there is the possibility of inertia continue to go up. Take Shenzhen as an example ...

Hive is optimized for different queries, and optimization can be controlled by configuration, this article will introduce some of the optimization strategies and optimization control options. Column cropping (columns pruning) When reading data, read only the columns that are needed in the query, ignoring the other columns. For example, for queries: SELECT a,b from T WHERE e < 10; Where T contains 5 columns (a,b,c,d,e), the column c,d will be ignored and only read A, B, e column ...