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Grails’ JSONObject.NULL More or Less Equal To Null


Since Groovy 1.8 we can check if a Map is equal to another Map if the keys and values are the same. Very convenient in tests for example. def someMap = [age: 34, name: "Ted"] assert someMap == [name: "Ted", age: 34] Today I kept staring at a failure, while testing some x and y graph data points returned by ...

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My Thoughts on Go


Meh I have been working on a project that needs to run as small-footprint native code. I’ve been doing C since 1980 and have written a fair number of commercial packages in C, C++, Objective-C and blends among them. But after a couple of decades doing Java and other managed languages, I no longer want to have to think about ...

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Akka samples with scala and Spring


I was looking around recently for Akka samples with Spring and found a starter project which appeared to fit the bill well. The project however utilizes Spring-Scala which is an excellent project, but is no longer maintained. So I wanted to update the sample to use core Spring java libraries instead. So here is an attempt on a fork of ...

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Do Not Make This Mistake When Developing an SPI


Most of your code is private, internal, proprietary, and will never be exposed to public. If that’s the case, you can relax – you can refactor all of your mistakes, including those that incur breaking API changes. If you’re maintining public API, however, that’s not the case. If you’re maintaining public SPI (Service Provider Interfaces), then things get even worse. ...

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Getting version string from a Maven based web application


When you package a maven project, it will automatically generate a file inside that will contains the version, artifactId and groupId information. These are handy to have and to display for your web application at runtime. One can use a method like following to retrive it. public class Application { private String version; public String getVersion() { if (version ...

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Quasar and Akka – a Comparison


The actor model is a design pattern for fault-tolerant and highly scalable systems. Actors are independent worker-modules that communicate with other actors only through message-passing, can fail in isolation from other actors but can monitor other actors for failure and take some recovery measures when that happens. Actors are simple, isolated yet coordinated, concurrent workers. Actor-based design brings many benefits:     ...

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What is Garbage Collection?


The following is an example from our Garbage Collection Handbook which will be published in the forthcoming weeks. In the meanwhile, take your time to get yourself familiar with the basics of the Garbage Collection – this is going to be the very first chapter of the book. At the first sight, garbage collection should be dealing with what the name suggests – finding ...

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How to Make More Money (and the plateau)


Most extended discussions about the technology industry and software engineering trade eventually find their way to the topics of worker supply and demand, talent shortages (real or otherwise), and compensation. Every Best Jobs of The Year list (examples here or here or here or here) features a Top 10 littered with assorted job titles given to those who code, often including salary data that could cause non-technical readers to regret life decisions. New ...

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