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Checking images for similarity with OpenCV
...to the otherwise same view) you can also work with absdiff codota.com/code/java/methods/org.opencv.core.Core/absdiff Thresholding the result produces a mask that allows you to highlight the regions that changed from scene to scene.
– Max F.
Mar 20 at 17:01
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What are the differences between Abstract Factory and Factory design patterns?
...famous third example is Josh Bloch's Static Factory Pattern from Effective Java. The Head First Design Patterns book includes yet another pattern they call Simple Factory.
Don't fall into the trap of assuming every Factory pattern must match one from the GoF.
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C# vs C - Big performance difference
...That's what pre-jitting with ngen.exe solves. We're talking about C#, not Java.
– Hans Passant
Mar 17 '12 at 14:21
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What are the best practices for JavaScript error handling?
I'm looking to start making my JavaScript a bit more error proof, and I'm finding plenty of documentation on using try , catch , finally , and throw , but I'm not finding a ton of advice from experts on when and where to throw errors.
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R and version control for the solo data analyst
...net to catch mistakes can be a great thing to have.
I've worked as a solo Java developer, and I still use source control. If I'm checking things in continuously I can't lose more than an hour's work if something goes wrong. I can experiment and refactor without worrying, because if it goes awry I...
Why can't decimal numbers be represented exactly in binary?
...ting decimal point types have a fixed size like System.Decimal others like java.math.BigDecimal are "arbitrarily large" - but they'll hit a limit at some point, whether it's system memory or the theoretical maximum size of an array. This is an entirely separate point to the main one of this answer, ...
Should logger be private static or not
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Understanding Fragment's setRetainInstance(boolean)
... As far as I can tell, if you have setRetainInstance(true), the Fragment java object, and all its contents are not destroyed on rotation, but the view is recreated. That is onCreatedView() is called again. It's basically the way it should have worked with Activities since Android 1.0. I don't thin...
Generate a random point within a circle (uniformly)
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Thanks, this is your code in Java, maybe someone will find it useful: float random1 = MathUtils.random(); float random2 = MathUtils.random(); float randomXPoint = random2*radiusMathUtils.cos(MathUtils.PI...
How do you organize your version control repository?
...pecific version of EVERY component is being used, including your platform (Java A.B.C.D) and your build tool (Ant E.F.G.H). Otherwise, you will eventually encounter a bug and your first BIG problem will be tracking down what versions of your various components are involved. It is simply better to ...