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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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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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How to implement a rule engine?

I have a db table that stores the following: 10 Answers 10 ...
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Using a ListAdapter to fill a LinearLayout inside a ScrollView layout

I'm facing a very common problem: I layed out an activity and now it turns out it should display a few items within this ScrollView . The normal way to do that would be to use the existing ListAdapter , connect it to a ListView and BOOM I'd have my list of items. ...
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In JavaScript can I make a “click” event fire programmatically for a file input element?

I'd like to make a click event fire on an <input type="file"> tag programmatically. 28 Answers ...
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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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Getting result of dynamic SQL into a variable for sql-server

Executing dynamic SQL as follows in Stored Procedure: 6 Answers 6 ...
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Bootstrap 3 and 4 .container-fluid with grid adding unwanted padding

I'd like my content to be fluid, but when using .container-fluid with Bootstrap's grid, I'm still seeing padding. 13 Answ...
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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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How to display PDF file in HTML?

I have an auto generated PDF file by itext and I need to display that PDF file in HTML. My question is: How to display a local PDF file in HTML using pdf.js ? Should that PDF file be generated by some standards? ...