By Cloves Carneiro Jr., Rida Al Barazi
Starting Rails three is the sensible place to begin for someone eager to construct dynamic internet purposes utilizing the Rails framework for Ruby. You'll learn the way the entire elements of Rails healthy jointly and the way you could leverage them to create refined net purposes with much less code and extra joy.
This booklet is very like minded to these with very little adventure with internet software improvement, or who've a few adventure yet are new to Rails. starting Rails three assumes uncomplicated familiarity with internet phrases and applied sciences, yet doesn't require you to be knowledgeable. instead of delving into the arcane information of Rails, the focal point is at the points of the framework that may develop into your choose, shovel, and awl. half heritage lesson, half creation to object-oriented programming, and half dissertation on open resource software program, this name doesn't simply clarify how you can do anything in Rails, it explains why.
* learn how to create Rails net purposes from scratch
* encompasses a mild advent to the Ruby programming language
* thoroughly up-to-date to incorporate the beneficial properties of Rails three
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* indicates find out how to produce purposes combining Canvas drawings, images, and movies
* Explains the best way to include Google Maps and geolocation into your tasks
* unearths how one can construct functions requiring chronic info, storing the data in the neighborhood or on a database at the server
<h3>What you’ll learn</h3> * how one can create line drawings utilizing mathematical operations for outlining coordinate positions
* the best way to comprise Google Maps and geolocation to figure out the positioning of the person
* Use HTML5 Audio for occasion sounds and historical past tune
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<h3>Table of Contents</h3><ol> * construction the HTML5 Logo—Drawing on Canvas, with Scaling, and Semantic Tags
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* Bouncing Video—Animating and covering HTML5 video
* Map Maker—Combining Google Maps and Canvas
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Why research Scala? You don’t must be an information scientist or allotted computing specialist to understand this object-oriented practical programming language. This useful ebook offers a finished but approachable creation to the language, entire with syntax diagrams, examples, and workouts.
Achieve services in processing and storing facts through the use of complex concepts with Apache Spark
About This ebook
• discover the combination of Apache Spark with 3rd occasion purposes akin to H20, Databricks and Titan
• assessment how Cassandra and Hbase can be utilized for garage
• a sophisticated consultant with a mix of directions and sensible examples to increase the main up-to date Spark functionalities
Who This booklet Is For
If you're a developer with a few adventure with Spark and need to bolster your wisdom of the way to get round on this planet of Spark, then this e-book is perfect for you. easy wisdom of Linux, Hadoop and Spark is thought. moderate wisdom of Scala is anticipated.
What you are going to examine
• expand the instruments on hand for processing and garage
• learn clustering and type utilizing MLlib
• become aware of Spark movement processing through Flume, HDFS
• Create a schema in Spark SQL, and find out how a Spark schema could be populated with information
• research Spark dependent graph processing utilizing Spark GraphX
• mix Spark with H20 and deep studying and study why it's invaluable
• assessment how graph garage works with Apache Spark, Titan, HBase and Cassandra
• Use Apache Spark within the cloud with Databricks and AWS
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Extra info for Beginning Rails 3
Apple’s Developer Tools package, Xcode Tools, includes a compiler and provides the easiest way to set up a development environment on your Mac. html. NOTE Before proceeding, be aware that Xcode is a large download. Weighing in at over 1GB, it’s not the sort of thing you want to be downloading over a slow Internet connection. Before you begin downloading, you may want to try to find it on your installation DVD. Xcode is packaged as a regular Apple installer (look for it on the installation DVD), so all you need to do is double-click its icon and answer a few basic questions, and you should be on your way.
Erb template. Start up the web server again using the rails server command, and request the URL http://localhost:3000/salutation/hello in your browser. You should see the result shown in Figure 2-4. Figure 2-4. The “Hello World” application Sure enough, there’s your greeting! The hello template reads the @message variable that you set in the controller and, with a little help from ERb, printed it out to the screen. rb file. :format))) For now, it’s enough that you can make the mental connection between URL segments and the code in your application.
Access denied for user 'root'@'localhost' (using password: NO) then you need to adjust your connection settings. yml configuration file. Creating the Article Model Now that you can connect to the database, in this section you create a model. Remember that models in Rails correspond to database table names. Because you want to model articles, let’s create a model named Article. By convention, model names are singular and correspond to plural table names. So, an Article model expects a table named articles; a Person model expects a table named people.