Download Agile Web Development with Rails 3.1 (Pragmatic Programmers) by Sam Ruby, Dave Thomas, David Heinemeier Hansson PDF

By Sam Ruby, Dave Thomas, David Heinemeier Hansson

Ruby on Rails is helping you produce top quality, beautiful-looking internet functions speedy. you think about growing the applying, and Rails looks after the main points. Tens of millions of builders have used this award-winning ebook to profit Rails. it is a large, far-reaching educational and reference that is prompt through the Rails middle staff. in case you are new to Rails, you will get step by step counsel. if you are an skilled developer, this ebook offers you the excellent, insider details you would like. Rails has developed through the years, and this booklet has developed in addition to it. We nonetheless commence with a step by step walkthrough of establishing a true program, and in-depth chapters examine the integrated Rails gains. This version now supplies new Ruby and Rails clients additional information at the Ruby language and takes extra time to give an explanation for key techniques all through. top practices on how one can follow Rails proceed to alter, and this variation retains up. Examples use cookie sponsored periods, HTTP authentication, and energetic Record-based kinds, and the ebook focuses all through at the correct technique to use Rails. also, this variation now displays Ruby 1.9, a brand new liberate of Ruby with giant practical and function advancements.

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Extra info for Agile Web Development with Rails 3.1 (Pragmatic Programmers)

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0 at the current time). A JavaScript interpreter. Both Microsoft Windows and Mac OS X have JavaScript interpreters built in, and Rails will use the version already on your system. On other operating systems, you may need to install a JavaScript interpreter separately. Some libraries, depending on the operating system. A database. 1 in this book. 2. 2 for all new Rails applications. 2 has improved syntax and performance. 0. 7 instead, some of the generated scaffolding will use the “old style” hash syntax.

As you add functionality to the code, Rails automatically creates test stubs for that functionality. The framework makes it easy to test applications, and as a result, Rails applications tend to get tested. Rails applications are written in Ruby, a modern, object-oriented scripting language. you can express ideas naturally and cleanly in Ruby code. This leads to programs that are easy to write and (just as important) are easy to read months later. Rails takes Ruby to the limit, extending it in novel ways that make a programmer’s life easier.

Normal content is passed through without being changed. However, content between <%= and %> is interpreted as Ruby code and executed. The result of that execution is converted into a string, and that value is substituted in the file in place of the <%=…%> sequence. now %> *

When we refresh our browser window, we see the time displayed using Ruby’s standard format:[14] Notice that if you hit Refresh in your browser, the time updates each time the page is displayed. It looks as if we’re really generating dynamic content.

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