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How to force LINQ Sum() to return 0 while source collection is empty

Basically when I do the following query, if no leads were matched the following query throws an exception. In that case I'd prefer to have the sum equalize 0 rather than an exception being thrown. Would this be possible in the query itself - I mean rather than storing the query and checking query.A...
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Android and setting alpha for (image) view alpha

Is there really no XML attribute counterpart to setAlpha(int) ? 9 Answers 9 ...
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Generate a random number in the range 1 - 10

Since my approach for a test query which I worked on in this question did not work out, I'm trying something else now. Is there a way to tell pg's random() function to get me only numbers between 1 and 10? ...
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How do I calculate square root in Python?

Why does Python give the "wrong" answer? 10 Answers 10 ...
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How to inspect the return value of a function in GDB?

Is it possible to inspect the return value of a function in gdb assuming the return value is not assigned to a variable? ...
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Is gcc 4.8 or earlier buggy about regular expressions?

I am trying to use std::regex in a C++11 piece of code, but it appears that the support is a bit buggy. An example: 3 Answe...
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Which, if any, C++ compilers do tail-recursion optimization?

It seems to me that it would work perfectly well to do tail-recursion optimization in both C and C++, yet while debugging I never seem to see a frame stack that indicates this optimization. That is kind of good, because the stack tells me how deep the recursion is. However, the optimization would be...
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How to use > in an xargs command?

I want to find a bash command that will let me grep every file in a directory and write the output of that grep to a separate file. My guess would have been to do something like this ...
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how to override left:0 using CSS or Jquery?

I have an element, which has the following CSS: 5 Answers 5 ...
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Purpose of asterisk before a CSS property

The following is taken from the Yahoo CSS reset. Can someone please explain the purpose of the asterisks? 6 Answers ...