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Read e-book online Agile Web Development with Rails (4th edition) PDF

By Dave Thomas, David Heinemeier Hansson, Sam Ruby

ISBN-10: 1934356549

ISBN-13: 9781934356548

Ruby on Rails is helping you produce high quality, beautiful-looking net functions speedy. you consider growing the applying, and Rails looks after the details.

Tens of hundreds of thousands of builders have used this award-winning e-book to profit Rails. It's a wide, far-reaching educational and reference that's prompt by means of the Rails middle workforce. If you're new to Rails, you'll get step by step information. If you're an skilled developer, this ebook provides you with the great, insider info you need.

Rails has developed through the years, and this booklet has developed besides it. We nonetheless commence with a step by step walkthrough of establishing a true program, and in-depth chapters examine the integrated Rails positive factors. This version now provides new Ruby and Rails clients additional information at the Ruby language and takes extra time to provide an explanation for key thoughts all through. most sensible practices on the best way to practice Rails proceed to alter, and this variation retains up. Examples use cookie sponsored periods, HTTP authentication, and lively Record-based types, and the booklet focuses all through at the correct method to use Rails. also, this variation now displays Ruby 1.9, a brand new unlock of Ruby with great useful and function improvements.

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Related stylesheet commands can be grouped and then externalized as a separate template file to be referenced by a multitude of Web pages. CSS is defined as level 1 and level 2 specifications. Level 1 was written with HTML in mind, while level 2 was expanded to include general markup styles for XML documents. org/css-validator/ Due to varying levels of browser support, cross-browser design strategies must be used to ensure appropriate presentation and behavior of CSS elements. In general, this technology should be used with great attention to support of specification elements.

For example, text and images can be moved about the window, and hidden or shown, under the command of a script. Also, scripting can be used to change the color or image of a link when the mouse is moved over it, or to validate a text input field of a form without having to send it to the server. Unfortunately, there are several disadvantages when using DHTML. The greatest of these is that two different implementations (Netscape and Microsoft) exist and are found only on the more recent browser versions.

Many of the choices continue to evolve and expand as the J2EE specification matures to include a broader view of the enterprise architecture. 3 specification. In this chapter, we are going to show some of the current technologies to implement wireless and pervasive solutions. 1 Web client Figure 6-1 shows the recommended technologies for Web clients. Figure 6-1: Web client technology model The clients are "thin clients" with little or no application logic. Applications are managed on the server and downloaded to the requesting clients.

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Agile Web Development with Rails (4th edition) by Dave Thomas, David Heinemeier Hansson, Sam Ruby


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