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Handling exceptions from Java ExecutorService tasks

...her explicitly or via methods such as submit, these task objects catch and maintain computational exceptions, and so they do not cause abrupt termination, and the internal exceptions are not passed to this method. When you submit a Runnable, it'll get wrapped in a Future. Your after...
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Difference between map and collect in Ruby?

I have Googled this and got patchy / contradictory opinions - is there actually any difference between doing a map and doing a collect on an array in Ruby/Rails? ...
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What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?

...ge-processing problems in Haskell. I'm working with both bitonal (bitmap) and color images with millions of pixels. I have a number of questions: ...
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How dangerous is it to compare floating point values?

... First of all, floating point values are not "random" in their behavior. Exact comparison can and does make sense in plenty of real-world usages. But if you're going to use floating point you need to be aware of how it works. Erring on the side of assuming floating point ...
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Detecting superfluous #includes in C/C++?

I often find that the headers section of a file get larger and larger all the time but it never gets smaller. Throughout the life of a source file classes may have moved and been refactored and it's very possible that there are quite a few #includes that don't need to be there and anymore. Leaving...
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Proper Repository Pattern Design in PHP?

... The Goals: Create a complete example of a basic controller for viewing and editing Users. All code must be fully testable and mockable. The controller should have no idea where the data is stored (meaning it can be changed). Example to show a SQL implementation (most common). For maximum perform...
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Arrow operator (->) usage in C

...g a book called "Teach Yourself C in 21 Days" (I have already learned Java and C# so I am moving at a much faster pace). I was reading the chapter on pointers and the -> (arrow) operator came up without explanation. I think that it is used to call members and functions (like the equivalent of...
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Legality of COW std::string implementation in C++11

It had been my understanding that copy-on-write is not a viable way to implement a conforming std::string in C++11, but when it came up in discussion recently I found myself unable to directly support that statement. ...
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When should I mock?

I have a basic understanding of mock and fake objects, but I'm not sure I have a feeling about when/where to use mocking - especially as it would apply to this scenario here . ...
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Making a div vertically scrollable using CSS

...bar can be triggered with any property overflow, overflow-x, or overflow-y and each can be set to any of visible, hidden, scroll, auto, or inherit. You are currently looking at these two: auto - This value will look at the width and height of the box. If they are defined, it won't let the box expa...