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

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

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

You will find out how to use Git for resource keep an eye on and most sensible perform strategies to create purposes like a professional. crucial, and often-missed, info on trying out and studying to software with Ruby also are covered.

This publication is definitely fitted to somebody with little to no Ruby or Rails adventure, or almost certainly even anyone without event constructing net purposes in any respect. starting Rails four does imagine a simple familiarity with the net and regular internet phrases, yet doesn’t require you to be knowledgeable of those. This ebook will springboard your trip into internet software improvement, and exhibit you ways a lot enjoyable construction net purposes with Ruby on Rails can be.

* learn how to create Rails purposes from the ground up
* examine the fundamentals of the Ruby programming language
* thoroughly up-to-date for Rails four, together with new details on faster hyperlinks, etc.

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

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Additional info for Beginning Rails 4 (3rd Edition)

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The basic idea is that code is much more readable if the person looking at it (probably you) doesn’t have to guess what phi stands for. This is extremely important when you come back to a piece of code after a year or so. Operators You can combine Ruby code using operators. Many classes implement operators as methods. Table 4-2 lists the most common operators and their functions. Table 4-2. Ruby Operators Operator Description [] []= Assignment * / % + ** Arithmetic <= >= < > Comparison .. Range & ^ | AND, exclusive OR, regular OR (bitwise) || && not or and Logical operators Ruby contains a ternary operator that you can use as a short notation for if-else-end.

Among these are a unit test (for testing your model’s functionality, as discussed in Chapter 11) and a database migration. A database migration contains instructions for modifying the database table and columns. Whenever you generate a new model, a migration is created along with it. ■■Note If you want to skip generation of the migration when generating a new model, you can pass the --skip-migration argument to the generator. This may be useful if you’re creating a model for an existing database or table.

You have a list of all the students who are currently participating on a team, along with their student IDs. This example looks at the rowing team. ] ■■Note This is called a multidimensional array. It’s simply an array that contains more arrays as elements. first => [1975, "Smith", "John"] This is an array of [id, first_name, last_name]. You’d probably need to add a comment to explain that. ] } That works for now. But it’s kind of ugly, and you could easily get confused, especially if you kept adding teams.

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