By Aneesha Bakharia
Ruby on Rails is a feature-rich, effortless to benefit, and strong internet software framework that makes growing subtle, complete featured internet functions a snap. With the intuitive, undemanding nature of Ruby and the advance platform supplied through Rails, a person can prepare full-fledged internet functions speedy, whether they're new to internet programming. Ruby on Rails energy! is a entire creation to either the Ruby language and the Ruby on Rails framework, giving you every thing you must writer the following profitable net 2.0 software. It begins with the fundamentals: fitting Ruby, Ruby on Rails, and MySQL, and development an easy software in Rails. Then, because the Ruby on Rails framework is powered via the Ruby language, the publication strikes directly to disguise the fundamentals of Ruby, making the educational curve for Ruby on Rails a lot more straightforward to navigate. From there, the basics each person must improve a powerful internet software in Rails are coated extensive, from growing an interface to create, retrieve, replace and delete documents in a database with the Rails scaffold generator, to figuring out the version View Controller paradigm (Active list, motion Controller and motion View) and utilizing internet prone, AJAX, and Adobe Flex. through the top of the booklet, you’ll have created a number of functions in Rails, together with a web publication, a wiki, and a discussion board.
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Additional resources for Ruby on rails power!: the comprehensive guide
The first letter of the name of a constant must be in uppercase. This is the Ruby convention to denote a constant. 12222 Objects and Data Types In Ruby everything is an object, even simple data types. Strings, integers, and floats are all objects. ) notation. class => Float We can also use the is_a? (Float) => false 27 QQQ CHAPTER 2 } Ruby Essentials The to_* methods are handy when you need to convert data types. An integer can be converted to a string using the to_s method. A string can be converted to an integer using the to_i method.
Let’s create an array that stores Australian cities and then display the first element (referenced as 0). cities = [ "cairns", "brisbane", "sydney", "perth", "adelaide" ] puts cities The array is a Ruby object and has many useful methods. empty? uniq => [1,2,3,4,5,6] The each do code block iterates over all elements and stores the value of the current element in the variable between the pipe characters. This is handy when we need to print all elements. each do |city| puts "Australia has a city called " + city end The each_with_index code block does exactly as its name implies.
The methods or actions in a controller need to link to a view. Rails creates a folder for you to store the views that belong to a specific controller in the app/ views directory. We passed Greeting to script/generate, but it converted the name to lowercase and added a _controller suffix. This is a Rails convention. The _controller suffix must be added to all controllers. rb file contains a class called GreetingController. The class that is associated with a controller starts with a capital letter and is suffixed with Controller.
Ruby on rails power!: the comprehensive guide by Aneesha Bakharia