Scala function

Function without parameters Simple Scala function Example def hello_world() = { println (“Hello world!”) } Hello world!   Function with parameters Example of a scalar function that supports parameters def sum_data(x: Int = 2, y: Int = 3): Int = { x +...

ElasticSearch

ElasticSearch definition Elasticsearch is an open-source real-time search server that provides indexed and distributed storage based on Lucene. It provides all the Lucene search power for full-text searches, but simplifies queries through its to RestFul Web interface....

Apache Spark

Spark definition Apache Spark is a distributed computing system of free software, which allows to process large sets of data on a set of machines simultaneously, providing horizontal scalability and fault tolerance. To meet these features provides a program...