Beginning Ruby on Rails by Steve Holzner

By Steve Holzner

Ruby on Rails is the innovative on-line programming software that makes developing practical e-commerce websites swifter and more uncomplicated than ever. With the intuitive, simple nature of Ruby and the improvement platform supplied by means of Rails, you could prepare full-fledged internet purposes speedy, no matter if you are new to internet programming.You will discover a thorough creation to either Ruby and Rails during this e-book. you will get the simple directions for buying and fitting either; comprehend the character of conditionals, loops, equipment, and blocks; and familiarize yourself with Ruby's periods and gadgets. you are going to discover ways to construct Rails functions, connect with databases, practice worthy trying out, and placed the whole lot jointly to create real-world purposes reminiscent of buying carts and on-line catalogs - apps you can use correct away.What you are going to research from this ebook* how one can set up and use Ruby and Rails* Object-oriented programming with Ruby* Rails basics and the way to create easy on-line functions* the way to paintings with HTML controls, use types in Rails purposes, and paintings with classes* information on operating with databases and developing, enhancing, and deleting database files* tools for dealing with cookies and filters and for caching pages* the right way to attach Rails with AjaxWho this booklet is forThis ebook is for a person who desires to increase on-line functions utilizing Ruby and Rails. A uncomplicated knowing of programming is beneficial; a few wisdom of HTML is necessary.Wrox starting publications are crafted to make studying programming languages and applied sciences more straightforward than you think that, delivering a dependent, instructional structure that might advisor you thru all of the thoughts concerned.

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I’m also fine, thanks.! qxp 10/23/06 8:02 PM Page 12 Chapter 1 2. 3. rb. rb Hello Hello there Nice to see you. How are you? Fine, and you? I’m also fine, thanks. ” How It Works This example gives a good overview of the ways of working with single- and double-quoted text in Ruby. And, there’s even more to come — double-quoted strings have some additional power that you’ll see after the upcoming discussion on variables. There’s another way of working with text strings that you should know about in Ruby: HERE documents.

To create a hash, you use curly braces, { and }, not square braces ([]) as with arrays. Here’s an example: money_I_am_owed = {“Dan” => “$1,000,000”, “Claire” => “$500,000”} Here, “Dan” is a hash key (in hashes, the index is usually called the key), and “$1,000,000” is the value associated with that key in the hash. The => operator separates the keys from the values. You can extract data from the hash by using its keys. qxp 10/23/06 8:02 PM Page 28 Chapter 1 Note that to access data in a hash, you use [], as with an array, not {} as you might expect (and as you use in other languages).

However, if you’ve got a single statement whose operation isn’t central to the rest of the code, you can use if and unless modifiers. qxp 10/23/06 8:01 PM Page 39 Conditionals, Loops, Methods, and Blocks easily be missed by someone scanning your code. Of course, the way you actually write your code, including using if and unless modifiers, is up to you. Using the case Statement Ruby also supports a case statement, much like the switch statement in other languages. This one is much like a multi-path if statement, and it’s a powerful one.

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Beginning Ruby on Rails by Steve Holzner
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