Tutorial by Topics

Because regular expressions are limited to either a regular grammar or a context-free grammar, there are many common misuses of regular expressions. So in this topic there are a few example of when you should NOT use regular expressions, but use your favorite language instead. Some people, when...

There are two general ways of specifying HOW Entity Framework will map POCO classes to database tables, columns, etc.: Data Annotations and Fluent API. While Data Annotations are a simple to read and understand, they lack of certain features such as specifying the "Cascade on Delete" b...

Variables and scopesDetailsapplicationServletContext instanceapplicationContextSpring ApplicationContext instanceflashThe flash objectgrailsApplicationGrailsApplication instanceoutresponse writer for writing to the output streamparamsparams object for retrieving request parametersrequestHttpServlet...

unsigned alarm(unsigned seconds); int kill(pid_t pid, int sig); Function, Parameter(s), Return ValueDescriptionalarm()function nameunsigned secondsSeconds to raise an alarm or 0 to cancel any pending alarm>= 00 if no other alarm was pending, else the number of seconds the pending alarm s...

Sinatra is a simple Ruby DSL for quickly creating web applications. It has built in features for routing, using templates, serving static files, helpers, error handling and many other topics. http://www.sinatrarb.com/intro.html VersionRelease Date2.0.0beta22016-08-222.0.0beta12016-08-221.4.7...

pid_t getpid(void); pid_t getppid(void); pid_t fork(void); pid_t waitpid(pid_t pid, int *wstatus, int options); int execv(const char *path, char *const argv[]); Function, Parameter(s), Return ValueDescriptionfork()function namenonen/aReturns PID, 0, or -1The calling process receives the ...

CSS provides styles to HTML elements on the page. Inline styling involves usage of the style attribute in tags, and is highly discouraged. Internal stylesheets use the <style> tag and are used to declare rules for directed portions of the page. External stylesheets may be used through a <li...

This example shows a practical end to end example of creating a PayPal future payment from an Android device, using a Node server.

XJC is a Java SE tool that compiles an XML schema file into fully annotated Java classes. It is distributed within the JDK package and is located at /bin/xjc path. xjc [ options ] schema file/URL/dir/jar ... [-b bindinfo ] ... ParameterDetailsschema fileThe xsd schema file to convert to...

Higher Order Functions are functions that take functions as parameters and/or return functions as their return values.

Primary keys are used to uniquely identify a record in a table. A table may only have a single primary key (though the primary key can consist of multiple columns), and a primary key is required for certain types of replication. Primary keys are often used as (but don't have to be) the clustered ...

Starting with SQL Server 2008, it is possible to perform insert, update, or delete operations in a single statement using the MERGE statement. The MERGE statement allows you to join a data source with a target table or view, and then perform multiple actions against the target based on the results ...

function func_name($parameterName1, $parameterName2) { code_to_run(); } function func_name($optionalParameter = default_value) { code_to_run(); } function func_name(type_name $parameterName) { code_to_run(); } function &returns_by_reference() { code_to_run(); } function func_name(&$ref...