Agile Ruby on Rails Development & Consulting. The best way to manage a Ruby application's gems. What is Bundler?
Bundler provides a consistent environment for Ruby projects by tracking and installing the exact gems and versions that are needed. Bundler is an exit from dependency hell, and ensures that the gems you need are present in development, staging, and production. Starting work on a project is as simple as bundle install. Getting Started Getting started with bundler is easy! $ gem install bundler Specify your dependencies in a Gemfile in your project's root: source ' 'nokogiri'gem 'rack', '~>1.1'gem 'rspec', :require => 'spec' Learn More: Gemfiles Install all of the required gems from your specified sources: $ bundle install $ git add Gemfile Gemfile.lock Learn More: bundle install The second command adds the Gemfile and Gemfile.lock to your repository. Inside your app, load up the bundled environment: require 'rubygems'require 'bundler/setup' # require your gems as usualrequire 'nokogiri' Learn More: Bundler.setup Run an executable that comes with a gem in your bundle: Use Bundler with.
Ruby Primer - Syntactic Sugar for Special Methods. As an observant initiate, you've probably noticed that in the last lesson, Integer objects list mathematical operators like + and - among their methods.
You probably also thought to yourself that invoking the + method like so - 1.+(2) - to add two numbers would be... clumsy. It is, though it works just fine - try for yourself by adding 4 to 3 in the exercise below. Let us rephrase the previous example in a more natural syntax by omitting the periods and brackets. There are several other method names that have this special status - here's a quick summary of the ones you're most likely to run into. This last method ([]) you've probably already seen in the lesson that covers Arrays, and is arguably the most unique in its syntax.
Even more interesting is that it still works if you use the more traditional method syntax - see for yourself by running the example below. Agile Web Development with Rails 4. About this Book 456 pages Published: Release: P2.0 (2014-03-31) ISBN: 978-1-93778-556-7 Ruby on Rails helps you produce high-quality, beautiful-looking web applications quickly.
You concentrate on creating the application, and Rails takes care of the details. Tens of thousands of developers have used this award-winning book to learn Rails. It’s a broad, far-reaching tutorial and reference that’s recommended by the Rails core team. Rails has evolved over the years, and this book has evolved along with it. This edition is for Rails 4.0 and beyond. Learn Rails 4 Online at the Pragmatic Studio Want to learn how to build Rails 4 apps interactively through engaging videos and hands-on exercises?
In this online, self-paced course you’ll learn the fundamentals every Rails developer should know, and how to put all the pieces together, so you can confidently create your first Rails app or jump right into an existing app. “One of the best learning experiences I’ve ever had! About the Author. Ruby on Rails Screencasts - RailsCasts. Ruby on Rails E-commerce.