Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

A block of code is set as follows:

Dataset<Row> rowDS = spark.read().csv("data/loan_train.csv");
rowDS.createOrReplaceTempView("loans");
Dataset<Row> loanAmtDS = spark.sql("select _c6 from loans");

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

Dataset<Row>data = spark.read().csv("data/heart_disease_data.csv");
    System.out.println("Number of Rows -->" + data.count());

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.