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The best code coverage for Scala

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The best code coverage metric for Scala is statement coverage. Simple as that. It suits the typical programming style in Scala best. Scala is a chameleon and it can look like anything you wish, but very often more statements are written on a single line and conditional “if” statements are used rarely. In other words, line coverage and branch coverage ...

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The Definitive Guide to Coding Style Standards

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I’ve been rereading Jeff Atwood (Coding Horror) and Joel Spolsky (Joel on Software) and came across a discussion of coding style standards. It reminded me of the blog entry I was going to write “some day”. Today is “some day”. First I should ruin the joke by pointing it out – this is the “definitive guide” since nobody ever seems ...

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10 Awesome Programming Jokes of all time

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Whats the difference (similarity) between drug dealers and Software developers? Drug dealers: Refer to their clients as “users”. “The first one’s free!” Have important South-East Asian connections (to help move the stuff). Strange jargon: “Stick”, “Rock”, “Dime bag,” “E”. Realize that there’s tons of cash in the 14- to 25-year-old market. Job is assisted by industry’s producing newer, more potent ...

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How to start a big data analytics project

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When starting a Big Data analytics project, time is a very important issue. It may take from a few weeks to many years, and it depends on many factors, such as understanding the requirements, choosing the right technology, the complexity of the analytics and many more. An important thing to understand is that a big data analytics solution should be ...

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Code Katas

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In this post I want to talk about code katas. Most of you have heard of code katas before, many of you  probably have done some katas. A while ago code katas were getting a fair bit of attention. Including of course some skepticism. Just in case you haven’t heard of code kata yet, let me explain briefly. The term ...

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Would You Hire the CS Class of ’04 Today?

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A comment in a Reddit computer science career advice forum got me thinking. There was mention about the high volume of advice in the forum coming from inexperienced people relative to advice from industry veterans. The comment that got my attention (which I believe was made by an experienced person) was: And most of the people giving advice in this ...

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Error handling in Storm Trident topologies

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This post summarizes my current approach to error handling when designing Storm Trident topologies. I focus here on code design, not on deployment good practices like supervision nor redundancy. Because of the real-time stream nature of Storm, when facing most kinds of error we’ll ultimately have to move on to the next piece of data. Error handling in that context ...

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Customizing Log4j 2.0

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We are getting closer and closer to a Log4j 2 GA release and for that reason we should start looking into what it will give us. Personally I have a lot of reasons to be excited about Log4j 2.0. The community is great, the Apache License gives me a lot of freedom and finally it is protected by the Apache ...

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Mock final class

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Foreword If you already read some other blog post about unusual mocking, you can skip prelude via this link. I was asked to put together examples how to mock Java constructs well know for their testability issues:         Mock private method Mock final method Mock final class Mock constructor Mock static method I am calling these techniques ...

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Code review best practices

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Code review is a great software instrument and you should definitely use it to improve the quality of your code. But like any other tool, it may be misused sometimes. That’s why I came up with a list of best practices to guide you when reviewing your peers’ code.               Code review is not ...

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