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$ shopt -u option # Deactivate Bash's built-in 'option' $ shopt -s option # Activate Bash's built-in 'option' Character Classes Valid character classes for the [] glob are defined by the POSIX standard: alnum alpha ascii blank cntrl digit graph lower print punct space upper word xdig...

std::atomic<T> std::atomic_flag std::atomic allows atomic access to a TriviallyCopyable type, it is implementation-dependent if this is done via atomic operations or by using locks. The only guaranteed lock-free atomic type is std::atomic_flag.

C# version 3.0 was released as part of .Net version 3.5. Many of the features added with this version were in support of LINQ (Language INtegrated Queries). List of added features: LINQ Lambda expressions Extension methods Anonymous types Implicitly typed variables Object and Collection I...

static_assert( bool_constexpr, message ) static_assert( bool_constexpr ) /* Since C++17 */ ParameterDetailsbool_constexprExpression to checkmessageMessage to print when bool_constexpr is false Unlike runtime assertions, static assertions are checked at compile-time and are also enforced w...

Spring has made it so that configuring an ApplicationContext is extremely flexible. There are numerous ways to apply each type of configuration, and they can all be mixed and matched together nicely. Java configuration is a form of explicit configuration. A @Configuration annotated class is use...

A good explanation of HDFS and how it works. Syntax should contain the commands which maybe use in HDFS.

Aggregations operations process data records and return computed results. Aggregation operations group values from multiple documents together, and can perform a variety of operations on the grouped data to return a single result. MongoDB provides three ways to perform aggregation: the aggregation p...

ParameterDetailsfuncpython function, which takes numpy arrays as its inputs and returns numpy arrays as its outputsinplist of Tensors (inputs)Toutlist of tensorflow data types for the outputs of func

Session["Session_Key"] = Obj_Value; HTTP is stateless. ASP.NET session state is a framework that facilitates maintaining state between HTTP page requests. Session differs from the class level variables in its ability to remain available across post-backs and different pages. For ...

REST stands for Representational State Transfer (sometimes spelled "ReST"). It relies on a stateless, client-server, cacheable communications protocol and mostly HTTP protocol is used. It is primarily used to build Web services that are lightweight, maintainable, and scalable. A service ba...

Categoricals are a pandas data type, which correspond to categorical variables in statistics: a variable, which can take on only a limited, and usually fixed, number of possible values (categories; levels in R). Examples are gender, social class, blood types, country affiliations, observation time...