Nagios web interface, 858f

Named parameter, 745

• usage, 746c

Name server (NS), 893

Namespace conflict problem, 404

Naming conventions, 337–339, 650

National Institute of Standards & Technology (NIST), 817

Navigation, 104–105

Nested functions, 391–392, 392c

Netscape Navigator, 8, 74

Newsfeeds, 963

Nginx, 70, 910

Node.js, 2, 9, 69, 606

• advantages, 674–679

• API creation, 687–692, 688c

• bcrypt usage in, 854–855c

• disadvantages, 679–680

• DOM, 420, 420f

  • object properties, 421t

• express in, use of, 685–686, 685f

• first steps, 682–687

  • Hello World, 682f

  • running Hello World example, 683f

  • static file server, 683, 684f

• high volume data changes, 680f

• installing, 680–681

• introduction of, 674–679

  • blocking approach, 677f

• nonblocking thread-based, architecture of, 678f

• session state, 798–799

• simple application, 682–685

  • example, 682, 683f

• uploading files, 785c

• using cookies, 789, 789c

• verifying, 681

• view engine, 700f

• working with MongoDB, 761–768

• working with WebSockets, 696–700

NodeLists, DOM, 420

Nonsequential keys, illustration, 642c

Normal HTTP request— response loop, 499, 501f

<noscript> tag, 359

NoSQL, 756

• database, 70, 754–761

  • column stores, 759

  • document stores, 757–759

  • key-value stores, 757

  • row vs. column wise stores, 759f

  • storage, relational vs., 758f

• types, 757–760

Notification, user input validation, 223

npm (Node Package Manager), 681, 683

npmjs.com website, 681

Null coalescing operator, 657

NULL value, return, 641

Number

• input controls, 212f

• specialized control, 211–212

• validation, 462

Numeric value (testing function), 462c