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1. JPA Mini Book

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Don’t Block The UI

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I’ve talked with many end users about their badly written apps grievances and I’ve come to the conclusion that it isn’t a matter of native vs. cross platform or even HTML. Its a frustration issue, driven by unintuitive apps (hidden gestures etc.) and slow performance. The slow performance bit is the most misunderstood, there is a “feeling” of sluggishness that ...

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Using the “Do You Have Any Questions?” Question

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During most interviews, an interviewer provides the candidate the opportunity to ask questions. In most cases the highly-anticipated “Do you have any questions?” question falls towards the end of the session, though some companies today throw candidates a curveball and start the interview this way (consider yourself warned). Many candidates use this invitation to gather information that will be helpful in making a decision on any ...

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Do you really want to speed up your Maven compile/packaging? Then takari lifecycle plugin is the answer.

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Like many of you out there, I am working with a multi module Maven project. It is not a huge one comparing to many systems out there, it has 15 modules, with 3 different ear deployments, lots of parametrization with property files and around 100K lines of Java code. During peak development times, the code is heavily refactored, due it’s ...

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Agile Testing Days 2014–The #AgileTD Post

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Second time around is even better. And much more fun. You know people, who know you. You meet new people, who want to share and talk and ask. Oh and there’s beer, more beer. Thank you for all the people I met and re-met. You are awesome. You make ATD what it is. It is now summary time. Let’s recap, ...

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Spark: Parse CSV file and group by column value

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I’ve found myself working with large CSV files quite frequently and realising that my existing toolset didn’t let me explore them quickly I thought I’d spend a bit of time looking at Spark to see if it could help. I’m working with a crime data set released by the City of Chicago: it’s 1GB in size and contains details of ...

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Java Reflection Tutorial – The ULTIMATE Guide (PDF Download)

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This tutorial is about reflection, the ability of a computer program to examine and modify the structure and behavior (specifically the values, meta-data, properties and functions) of the program at runtime. We are going to explain what reflection is in general and how can be used in Java. Real uses cases about different reflection uses are listed in the next ...

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How to compress responses in Java REST API with GZip and Jersey

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There may be cases when your REST api provides responses that are very long, and we all know how important transfer speed and bandwidth still are on mobile devices/networks. I think this is the first performance optimization point one needs to address, when developing REST apis that support mobile apps. Guess what? Because responses are text, we can compress them. And with ...

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