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 explanations of their meanings.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "To update an existing document, we use the replace operation."

A block of code is set as follows:

function(doc, meta) {
  emit(meta.id, null);
}

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

function(doc, meta) {
  if (doc.type == "beer") {
    emit(null, null);
  }
}

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

./cbq-engine–couchbase http://localhost:8091

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: "Brewery documents in the beer-sample bucket contain address information."