Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system".

A block of code is set as follows:

let sumOfSquares(x: int, y: int) = { /* (1) */
 let xSq = x * x;
 let ySq = y * y;
 xSq + ySq
};

The code is highlighted as follows:

• Types are bolded
• Values are slanted
• Language-reserved words (keywords) are underlined

Also note that numbered comments are added to certain points in the code that need further explanation, for example:

1. This note explains the code marked with the comment /* (1) */

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

$ mkdir css
$ cd css

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel".