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:

ImgRes* new_ImgRes() {
  ImgRes* new_object = (ImgRes*) palloc( sizeof( ImgRes ) );
  new_object->h_px = 300;
  new_object->v_px = 300;
  new_object->dpi  = 96;
  return new_object;
}

char* to_string( ImgRes* object ){

return psprintf( TEXT_PATTERN,
                   object->h_px,  object->v_px,  object->dpi );
}

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

testdb=> CREATE TYPE t_media_file_type
AS ENUM ( 'audio', 'image', 'text' );

Bold: Indicates a new term, an important word, or words that you see onscreen. 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."