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MySql Table Insert if not exist otherwise update

It works if the datenum exists, but I want to insert this data as a new row if the datenum does not exist. 3 Answers ...
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System.Net.Http: missing from namespace? (using .net 4.5)

TL; DR: I'm new to this language and have no idea what I'm doing 16 Answers 16 ...
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How to commit changes to a new branch

I just made changes to a branch. How can I commit the changes to the other branch? 3 Answers ...
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How to make rpm auto install dependencies

I have built two RPM packages 11 Answers 11 ...
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How do I round a decimal value to 2 decimal places (for output on a page)

When displaying the value of a decimal currently with .ToString() , it's accurate to like 15 decimal places, and since I'm using it to represent dollars and cents, I only want the output to be 2 decimal places. ...
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Linux, Why can't I write even though I have group permissions?

I want to create a file in a directory owned by the staff group which I am a member of. Why can I not do this? 6 Answers ...
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Which letter of the English alphabet takes up most pixels?

I am trying to do some dynamic programming based on the number of characters in a sentence. Which letter of the English alphabet takes up the most pixels on the screen? ...
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Proper way to use AJAX Post in jquery to pass model from strongly typed MVC3 view

I'm a novice web programmer so please forgive me if some of my "jargon" is not correct. I've got a project using ASP.NET using the MVC3 framework. ...
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Concatenating two one-dimensional NumPy arrays

I have two simple one-dimensional arrays in NumPy . I should be able to concatenate them using numpy.concatenate . But I get this error for the code below: ...
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How can I copy the content of a branch to a new local branch?

I have worked on a local branch and also pushed the changes to remote. I want to revert the changes on that branch and do something else on it, but I don't want to lose the work completely. I was thinking of something like create a new branch locally and copy the old branch there, then I can revert ...