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: "The Elixir standard library has a List module defined."

A block of code is set as follows:

code\greeter.ex
defmodule Greeter do
def greet(name \\ "you") do
"Hello #{name} !"
end
end

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

supervised_app/mix.exs
def application do
  [applications: [:logger],
  mod: {SupervisedApp, []}]
end

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

> mix help

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: "Select the Load Charts tab to see graphical representation of memory usage, IO, and scheduler utilization over time."