Read e-book online Beginning Ruby on Rails PDF

By Steve Holzner

ISBN-10: 0470069155

ISBN-13: 9780470069158

Ruby on Rails is the innovative on-line programming instrument that makes growing sensible e-commerce websites speedier and more uncomplicated than ever. With the intuitive, elementary 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 ebook. 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 items. you are going to learn how to construct Rails purposes, connect with databases, practice invaluable checking out, and positioned the whole lot jointly to create real-world functions akin to procuring carts and on-line catalogs - apps one can use correct away.What you'll study from this e-book* tips on how to set up and use Ruby and Rails* Object-oriented programming with Ruby* Rails basics and the way to create easy on-line functions* tips on how to paintings with HTML controls, use versions in Rails functions, and paintings with periods* info on operating with databases and growing, modifying, and deleting database files* tools for dealing with cookies and filters and for caching pages* the way to attach Rails with AjaxWho this e-book is forThis booklet is for somebody who desires to strengthen on-line functions utilizing Ruby and Rails. A easy figuring out 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 uncomplicated than you're thinking that, supplying a established, educational layout that would advisor you thru the entire strategies concerned.

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To create web applications that do something more impressive, though, you need to get the Ruby language under your belt. That’s what the rest of this and the next couple of chapters are all about — building the foundation you’ re going to need when it comes to working with Ruby on Rails. Getting Star ted with Ruby Ruby is the language that is going to make everything happen. To work with Ruby, you need a text editor of the kind you already used to get the Ruby on Rails example working, such as WordPad (Start➪ Programs➪Accessories➪WordPad) or Notepad (Start➪Programs➪Accessories➪Notepad) in Windows.

End Using if and unless as Modifiers Here’s something cool that Ruby borrows from other languages like Perl: you can use if and unless to modify general Ruby statements. That means you can add if and unless clauses to general Ruby statements. ” unless temperature < 65 || temperature > 85 Use Ruby to run this program and the result is: Picnic time! ” if temperature > 65 && temperature < 85 So which should you use, if and unless statements, or if and unless as statement modifiers? Generally, you should stick with if and unless statements for clarity.

As you can see, it displays a few integers and floating-point numbers — even a hexadecimal number (which is displayed in decimal). 0 x 10-4. 1415. ”). ”. ””, because Ruby won’t know where the quotation actually ends. \’’. In fact, you don’t even have to use single or double quotes — Ruby can add them for you if you use the %q (single quotes) or %Q (double quotes) syntax. Just use %q or %Q with a single character, and Ruby will add quotes until it sees that character again. Yes, that was Cary Grant.!.

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Beginning Ruby on Rails by Steve Holzner


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