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R: Featuring engineering for a linear model

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I previously wrote about a linear model I created to predict how many people would RSVP ‘yes’ to a meetup event and having not found much correlation between any of my independent variables and RSVPs was a bit stuck. As luck would have it I bumped into Antonios at a meetup a month ago and he offered to take a ...

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R: Vectorising all the things

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After my last post about finding the distance a date/time is from the weekend Hadley Wickham suggested I could improve the function by vectorising it…                 @markhneedham vectorise with pmin(pmax(dateToLookup – before, 0), pmax(after – dateToLookup, 0)) / dhours(1) — Hadley Wickham (@hadleywickham) December 14, 2014 …so I thought I’d try and vectorise ...

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SSL / TLS REST Server – Client with Spring and TomEE

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When building a system, developers usually disregard the security aspects. Security has been always something very important to worry about, but it’s attracting even higher concerns than before. Just this year we had a few cases like the Heartbleed Bug or the CelebrityGate scandal. This has nothing to do with the post, but are just examples that security really matters ...

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How to mock Spring bean without Springockito

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I work with Spring several years. But I was always frustrated with how messy can XML configuration become. As various annotations and possibilities of Java configuration were popping up, I started to enjoy programming with Spring. That is why I strongly entourage using Java configuration. In my opinion, XML configuration is suitable only when you need to have visualized Spring ...

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Book Review: Mastering Lambdas: Java Programming in a Multicore World

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λ-programming (lambda-programming) has finally been introduced in the Java world as of version 8. It is the feature that will mostly change the way Java developers program and a new ‘weapon’ against boilerplate code. Java 8 has mostly applied functional programming in the Collections API by introducing the new Stream API. Additionally, this new feature promises to offer us a ...

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Doing microservices with micro-infra-spring

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Hi! We’ve been working at 4financeit for last couple of months on some open source solutions for microservices. I will be publishing some articles related to microservices and our tools and this is the first of (hopefully) many that I will write in the upcoming weeks (months?) on Too much coding blog. This article will be an introduction to the ...

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Grails Tutorial for Beginners – Grails Service Layer

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This tutorial will discuss the importance of the service layer in Grails and how to work with it. It also explains transaction management and how to utilize it. Introduction Separation Of Concerns Consider this analogy: Imagine a company where employees are assigned tasks on different nature of work. For example, say there is an employee named John Doe with the ...

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How to encapsulate Spring bean

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As far as I know Spring Framework doesn’t provide any mechanism to encapsulate Spring beans other than having separate contexts. So when you have public class registered in Spring’s Inversion of Control container, it can be autowired in any Spring bean from same context configuration. This is very powerful but it is also very dangerous. Developers can easily couple beans ...

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