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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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Finding the average of a list

I have to find the average of a list in Python. This is my code so far 23 Answers 23 ...
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Why implement interface explicitly?

So, what exactly is a good use case for implementing an interface explicitly? 11 Answers ...
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How do I find all of the symlinks in a directory tree?

I'm trying to find all of the symlinks within a directory tree for my website. I know that I can use find to do this but I can't figure out how to recursively check the directories. ...
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Flatten an irregular list of lists

...en covered before ( here , here , here , here ), but as far as I know, all solutions, except for one, fail on a list like this: ...
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Should a return statement be inside or outside a lock?

I just realized that in some place in my code I have the return statement inside the lock and sometime outside. Which one is the best? ...
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Python, compute list difference

... + m log n) operations (instead of O(n*m) operations), which doesn't seem too bad. Just make sure to check for neighbors to also eliminate duplicates in your binary search implementations. There might even be a package that already implements this, but I didn't check. – jaaq ...
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What is the point of function pointers?

...ple: stackoverflow.com/questions/1727824/… – sharptooth Dec 30 '10 at 15:02 You forgot virtual functions, essentiall...
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python list in sql query as parameter

I have a python list, say l 15 Answers 15 ...
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How to remove the first Item from a list?

I have the list [0, 1, 2, 3, 4] I'd like to make it into [1, 2, 3, 4] . How do I go about this? 10 Answers ...