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To run the example, the command syntax is: bin/hadoop jar hadoop-*-examples.jar wordcount [-m <#maps>] [-r <#reducers>] <in-dir> <out-dir> To copy data into HDFS(from local): bin/hadoop dfs -mkdir <hdfs-dir> //not required in hadoop 0.17.2 and later bin/h...

Parallel collections facilitate parallel programming by hiding low-level parallelization details. This makes taking advantage of multi-core architectures easy. Examples of parallel collections include ParArray, ParVector, mutable.ParHashMap, immutable.ParHashMap, and ParRange. A full list can be f...

constexpr is a keyword that can be used to mark a variable's value as a constant expression, a function as potentially usable in constant expressions, or (since C++17) an if statement as having only one of its branches selected to be compiled. The constexpr keyword was added in C++11 but for a...

Content of controls can be localized using Resource files, just as this is possible in classes. For XAML there is a specific syntax, that is different between a C# and a VB application. The steps are: For any WPF project: make the resource file public, the default is internal. For C# WPF proj...

There is no inherent answer in C# to this - so called - need. Nonetheless there are workarounds to satisfy this need. The reason I qualify the need as "so called" is that we only need methods with 2 or more than 2 values to return when we violate good programming principals. Especially ...

This method is used to check weather WI-Fi is connected or not. isNetworkAvailable() : To check if Internet available on device ParameterDetailContextA reference of Activity context If internet connected then method will return true or false.

PHP is an open source project, and as such, anyone is able to contribute to it. Broadly speaking, there are two ways to contribute to the PHP core: Bug fixing Feature additions Before contributing, however, it is important to understand how PHP versions are managed and released so that bug ...

Shows how a sqoop script could be used to import data from various datastores/databases.