Conventions

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

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "For now, simply create a new folder called csvreader and a file in it called CSVReader.scala."

A block of code is set as follows:

object CSVReader {
    def main(args: Array[String]) {
        for (line <- Source.fromFile("iris.csv").getLines()) {
            println(line)
        }
    }
}

Any command-line input or output is written as follows:

scala> xs dot ws
res2: Double = 27.5

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "You can access it via the Plot menu option."