Book Image

Learning Jupyter

By : Dan Toomey
Book Image

Learning Jupyter

By: Dan Toomey

Overview of this book

Jupyter Notebook is a web-based environment that enables interactive computing in notebook documents. It allows you to create and share documents that contain live code, equations, visualizations, and explanatory text. The Jupyter Notebook system is extensively used in domains such as data cleaning and transformation, numerical simulation, statistical modeling, machine learning, and much more. This book starts with a detailed overview of the Jupyter Notebook system and its installation in different environments. Next we’ll help you will learn to integrate Jupyter system with different programming languages such as R, Python, JavaScript, and Julia and explore the various versions and packages that are compatible with the Notebook system. Moving ahead, you master interactive widgets, namespaces, and working with Jupyter in a multiuser mode. Towards the end, you will use Jupyter with a big data set and will apply all the functionalities learned throughout the book.
Table of Contents (16 chapters)
Learning Jupyter
About the Author
About the Reviewer

Scala pattern matching

Scala has very useful, built-in pattern matching. Pattern matching can be used to test for exact and/or partial matches of entire values, parts of objects, and so on; you name it!

We can use this sample script for reference:

def matchTest(x: Any): Any = x match {
  case 7 => "seven"
  case "two" => 2
  case _ => "something"
val isItTwo = matchTest("two")
val isItTest = matchTest("test")
val isItSeven = matchTest(7)

We define a function called matchTest. It takes any kind of argument and can return any type of result (not sure if that is real-life programming!).

The keyword of interest is match. This means the function will walk down the list of choices until it gets a match on the value x passed and then returns it.

As you can see, we have numbers and strings as input and output.

The last case statement is a wildcard, catchall-if the code gets that far, it will match any argument.

We can see the output here: