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Example of using extensions in Swift

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Recently I needed a image in my iOS app that was oscillating. I ran into an example of Swift code that showed how to do it and it was actually quite easy to do (for the theory behind the formula see this). The code makes use of the ‘extension’ feature in Swift. This is a really cool feature in Swift. ...

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Use JUnit’s expected exceptions sparingly

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Sometimes, when we get pull requests for jOOQ or our other libraries, people change the code in our unit tests to be more “idiomatic JUnit”. In particular, this means that they tend to change this (admittedly not so pretty code): @Test public void testValueOfIntInvalid() { try { ubyte((UByte.MIN_VALUE) - 1); fail(); } catch (NumberFormatException e) {} try { ubyte((UByte.MAX_VALUE) + ...

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Running Any Docker Image On OpenShift Origin

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I’ve been using OpenShift since a while now. For many reasons. First of all, I don’t want to build my own Docker and Kubernetes environment on Windows and second of all, because I like the simple installation. After the Christmas holidays I decided to upgrade my machine to Windows 10. While I like the look and feel, it broke quite ...

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4 Free Weather Providers API To Develop A Weather App

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Android apps that give weather information are common in play store. Moreover, Weather app and widgets are one of the most downloaded items. When it is time to develop weather app, it is necessary to use a weather provider as the source of weather information. These weather providers expose a set of services or, in other words, a set of ...

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Cutting Corners

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The pressure to deliver yesterday is strong. If it’s not customers nagging you, it’s project managers breathing down your neck or your own self-doubt that this should have been simpler: the desire to get the task done quicker can often be irresistible. How do you strike the right balance between cutting corners and polishing the turd? While working through a ...

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Clustering And Scaling Services

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Many will tell you that they have a scalable system. After all, scaling is easy. Buy a server, install WebLogic (or whichever other monster application server you’re using) and deploy your applications. Then wait for a few weeks until you discover that everything is so “fast” that you can click a button, have some coffee, and, by the time you ...

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7 Ways ES2015 Can Improve Your JavaScript Programming

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AppDynamics enables companies to achieve and maintain the level of application performance that’s demanded by today’s software defined business. Try AppDynamics for Java and get started troubleshooting in a matter of minutes. ES6 is a major update to the JavaScript language, the first since the adoption of ES5 in 2009. The features of ES6 are being incorporated into JavaScript engines ...

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A Working DeltaSpike Tutorial

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On a recent project, I was faced with an interesting problem: take a service method that was given a single object and reuse the same code in the context of a nightly process that would run independently of the application over thousands of the same type of object. It would have been ridiculous to try to maintain an identical process ...

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Agile adoption by numbers – and some problems

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I’ve done a few agile introductions in my time, in fact I’ve started to feel I could almost write a book entitled “agile by numbers”. So yesterday when this question appeared on some LinkedIn group I thought I’d give it a quick go: “I am working with an organization which wants to explore agile adoption. What are the some of ...

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Docker Service Discovery On Microsoft Azure – Docker Java App Load Balanced By Nginx Or Apache HTTP, Mongo Replica Set And Hazelcast Cluster

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This project covers three service discovery use cases in Docker application deployments — including Nginx & Apache HTTP Server load balancing, Mongo Replica Set and Hazelcast Cluster. The service discovery framework in DCHQ provides event-driven life-cycle stages that executes custom scripts to re-configure application components. This is critical when scaling out clusters for which a load balancer may need to ...

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