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Updating data in the background

by Dimitris Tavlikos | May 2014 | Cookbooks Open Source

In this article, written by Dimitris Tavlikos, the author of iOS Development with Xamarin Cookbook, we will learn how to make use of iOS 7's background fetch feature. This feature automatically wakes up the app at system-managed intervals, giving it a specific amount of time to retrieve data and update the UI.

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Continuous Integration

by Zdenek Machek | May 2014 | Open Source Web Development

You have code and you have tests, but now you need to take complete advantage of them in order for them to really help you. What you need to do is run these tests, process the results, and then receive a notification if they fail. This is where we are heading in this article by Zdenek Machek, author of PHPUnit Essentials, and there are a few really good open source or free solutions available that can help you.

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Configuring placeholder datastores

by Abhilash GB | May 2014 | Enterprise Articles

In this article, by Abhilash GB, author of the book, Disaster Recovery Using VMware vSphere Replication and vCenter Site Recovery Manager, we will see the steps followed in order to configure a placeholder datastore. For every virtual machine that becomes part of a Protection Group, SRM creates a shadow virtual machine. A placeholder datastore is used to store the files for the shadow virtual machines. The datastore used for this purpose should be accessible to all the hosts in the datacenter/cluster serving the role of a recovery-host. For now, understand that configuring placeholder datastores is an essential step in forming an SRM environment.

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Going Beyond the Basics

by John Ewart | May 2014 | Networking & Telephony Open Source

In this article by John Ewart, author of Managing Windows Servers with Chef, we learn various aspects about Chef's language and also learn to handle multiple platforms.

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Sending Data to Google Docs

by Marco Schwartz | May 2014 | Networking & Telephony Open Source

In this article by Marco Schwartz, author of Internet of Things with the Arduino Yún, we will discuss about sending the data to a Google Docs spreadsheet so that it can be accessed remotely from any web browser or from the Google Docs mobile app, and calculate the energy consumption and some other useful data such as the total energy cost of the device connected to your project.

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Adding a Geolocation Trigger to the Salesforce Account Object

by Stephen Moss | May 2014 | Enterprise Articles

This article has been written by Stephen Moss, the author of Force.com Development Blueprints. You might have noticed that since the Winter '13 release, Salesforce offers a custom field type of geolocation. This field can be used to specify a location by its latitude and longitude. However, the standard Salesforce user interface doesn't provide a great deal of support for filling these fields in with useful values.

Fortunately, with a little bit of Apex code, we can add a trigger to the Salesforce Account Object to automatically geolocate an address when an account is saved or updated.

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Optimizing Magento Performance — Using HHVM

by Mathieu Nayrolles | May 2014 | e-Commerce Open Source Web Development

This article is written by Mathieu Nayrolles, the author of Magento Performance Site Optimization. HipHop Virtual Machine (HHVM) is the cornerstone of the PHP processing stack of Facebook and is currently able to increase the number of requests handle by a server by 9. It is open source and you can download it on GitHub.

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Building a Simple Blog

by Andrew Burgess | May 2014 | Open Source

In this article, by Andrew Burgess, the author of the book Backbone.js Blueprints, we're going to begin by assuming that your experience in Backbone is very minimal; in fact, even if you've never used Backbone before, you should still be able to follow along just fine. The application we're going to build in this article is a very simple blog. As blogs go, it's going to have very few features; there will be posts that viewers can read and make comments on. However, it will introduce you to every major feature in the Backbone library, get you comfortable with the vocabulary, and how these features work together in general.

In this article, we'll know how to:

  • Use Backbone's model, collection, and view components
  • Program the server side with Node.js (and Express.js) to create a backend for our Backbone app

So let's get started!

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Saving Data to Create Longer Games

by Jack Donovan | May 2014 | Beginner's Guides Games

This article by Jack Donovan, the author of the book, OUYA Game Development by Example Beginner's Guide, covers implementing long-term skill progression and saving game data.

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Case study – modifying a GoPro wrench

by Marcus Ritland | May 2014 | Open Source

In this article by Marcus Ritland, author of the book 3D Printing with SketchUp, we will discuss a case study where Kim found a wrench on Thingiverse that she likes for tightening a GoPro camera, but wished the handle was longer. The link to the wrench is http://www.thingiverse.com/thing:185739.

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Physics with UIKit Dynamics

by Kyle Begeman | May 2014 | Open Source

In this article, by Kyle Begeman, the author of Application Development in iOS 7, we will cover the basics of how UIKit Dynamics manages your application's behaviors. We will cover specific behaviors, such as gravity, bounce, and other physics properties. Additionally, we will learn how to create physical boundaries so that our views have something to collide with. Without these boundaries, our views would continue moving forever without stopping. We have a lot to cover, so let's get started!

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Using OpenStack Swift

by Amar Kapadia Kris Rajana Sreedhar Varma | May 2014 | Open Source

This article, by Amar Kapdia, Sreedhar Varma, and Kris Rajana, the authors of Implementing Cloud Storage with OpenStack Swift, explains the various mechanisms that are available to access OpenStack Swift. Using these mechanisms we will be able to authenticate accounts, list containers, create containers, create objects, delete objects, and so on. The various clients that are available to access OpenStack Swift are OpenStack Swift Client CLI, cURL client, HTTP REST API, JAVA libraries, .Ruby OpenStack libraries, Python libraries, and so on. In particular, we will be using OpenStack Swift client CLI, cURL and HTTP REST API to access OpenStack Swift and perform various operations on containers and objects. Also, we will be using EVault’s Long-Term Storage (LTS2) cloud storage to demonstrate the use of OpenStack Swift.

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Installing Vertica

by Rishabh Agrawal | May 2014 | Enterprise Articles

This article, by Rishabh Agrawal, the author of the book HP Vertica Essentials, highlights the installation of Vertica.

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Working with a Neo4j Embedded Database

by Onofrio Panzarino | May 2014 | Open Source

In this article, we'll see how to create a Neo4j database. Onofrio Panzarino, the author of this book, Learning Cypher, is a programmer with 15 years experience with various languages (mostly with Java), platforms, and technologies. He has gained a lot of experience with graph databases, particularly with Neo4j. This article throws light on setting up a new Neo4j database.

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Using the WebRTC Data API

by Andrii Sergiienko | May 2014 | Open Source Web Development

In this article, by Andrii Sergiienko, the author of WebRTC Blueprints, introduces the WebRTC technology and also highlights the salient features of Erlang. He also given a brief history of the Erlang language.

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