Beginning Rails 4 (3rd Edition) by Cloves Carneiro Jr., Rida Al Barazi, Adam Gamble

By Cloves Carneiro Jr., Rida Al Barazi, Adam Gamble

Starting Rails four is a booklet that might advisor you from by no means having programmed with Ruby, to having a Rails program equipped and deployed to the net. You’ll tips on how to mix all of the parts of Rails to enhance your individual internet purposes. you are going to use try pushed improvement to ensure your program works precisely such as you expect.

You will use Git for resource regulate and most sensible perform concepts to create purposes like a professional. crucial, and often-missed, details on trying out and studying to application with Ruby also are covered.

This e-book is definitely fitted to an individual with little to no Ruby or Rails event, or probably even somebody without event constructing internet functions in any respect. starting Rails four does think a easy familiarity with the internet and usual internet phrases, yet doesn’t require you to be a professional of those. This publication will springboard your trip into internet software improvement, and express you the way a lot enjoyable construction internet purposes with Ruby on Rails can be.

* discover ways to create Rails purposes from the ground up
* research the fundamentals of the Ruby programming language
* thoroughly up to date for Rails four, together with new details on rapid hyperlinks, etc.

Beginning Rails four lightly publications you thru designing your program, writing checks for the applying, after which writing the code to make your software paintings as anticipated.

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Additional info for Beginning Rails 4 (3rd Edition)

Sample text

43 Chapter 4 Introduction to the Ruby Language Rails is a great framework for the development of web-based applications. One of its greatest advantages over other web frameworks is that it’s written in Ruby, a very consistent and elegant object-oriented programming language. In order to increase your productivity as a Rails developer, it’s important that you master Ruby. If you’re new to programming, don’t worry: we explain the concepts in a way you can understand. Ruby was made to make developers happy.

Value_if_true : value_if_false: a = 10 b = 20 a > b ? a : b # => 20 In plain English, we’re saying if a is greater than b then return a, otherwise return b. The ternary operator is very concise but still easy to read. end constructs; it determines whether the method in question calls the given block. The block always appears immediately after the method call, with the start of the block coming on the same line as the method invocation. Here’s an example using the times method; times executes the given code block once for each iteration.

In Ruby, you often use symbols for hash keys, but in reality, any object can function as a key. You define hashes with curly braces, {}. You can create a Hash object by defining it with {:key => "value", :other_key => "other value" }. Then, you can pull out data by using square brackets on the end of the list. For instance, you retrieve a value by typing my_hash[:key] from the my_hash variable. Here are some examples: irb(main):005:0> my_hash = {:canada => 'Toronto', :france => 'Paris', :uk => 'London'} => {:canada=>"Toronto", :france=>"Paris", :uk=>"London"} We’ve created a hash and assigned it to the “my_hash” variable.

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