Download e-book for iPad: Agile Web Development with Rails (4th edition) by Dave Thomas, David Heinemeier Hansson, Sam Ruby

By Dave Thomas, David Heinemeier Hansson, Sam Ruby

ISBN-10: 1934356549

ISBN-13: 9781934356548

Ruby on Rails is helping you produce top quality, beautiful-looking internet purposes quick. you consider developing the applying, and Rails looks after the details.

Tens of hundreds of thousands of builders have used this award-winning ebook to benefit Rails. It's a vast, far-reaching instructional and reference that's urged by way of the Rails middle crew. If you're new to Rails, you'll get step by step counsel. If you're an skilled developer, this booklet provide you with the excellent, insider info you need.

Rails has advanced through the years, and this ebook has advanced in addition to it. We nonetheless begin with a step by step walkthrough of establishing a true program, and in-depth chapters examine the integrated Rails good points. This version now offers new Ruby and Rails clients additional information at the Ruby language and takes extra time to provide an explanation for key techniques all through. top practices on the right way to follow Rails proceed to alter, and this variation retains up. Examples use cookie subsidized periods, HTTP authentication, and energetic Record-based types, and the ebook focuses all through at the correct strategy to use Rails. also, this variation now displays Ruby 1.9, a brand new free up of Ruby with monstrous sensible and function improvements.

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Additional resources for Agile Web Development with Rails (4th edition)

Example text

If you’re coming to Ruby and Rails from languages such as C# and Java, you may be wondering about IDEs. After all, we all know that it’s impossible to code modern applications without at least 100MB of IDE supporting our every keystroke. For you enlightened ones, here’s the point in the book where we recommend you sit down—ideally propped up on each side by a pile of framework references and 1,000-page Made Easy books. There are no fully-fledged IDEs for Ruby or Rails (although some environments come close).

Ruby Names Local variables, method parameters, and method names should all start with a lowercase letter or with an underscore: order, line_item, and xr2000 are all valid. Instance variables (which we talk about on page 65) begin with an “at” sign (@), such as @quantity and @product_id. The Ruby convention is to use underscores to separate words in a multiword method or variable name (so line_item is preferable to lineItem). Class names, module names, and constants must start with an uppercase letter.

Although it might not be immediately apparent from the SQL1 you use to access them, relational databases are actually designed around mathematical set theory. Although this is good from a conceptual point of view, it makes it difficult to combine relational databases with object-oriented (OO) programming languages. Objects are all about data and operations, and databases are all about sets of values. Operations that are easy to express in relational terms are sometimes difficult to code in an OO system.

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

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