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Transactions in .net

...that should be used? What are the pitfalls to look out for etc. All that commit and rollback stuff. I'm just starting a project where I might need to do some transactions while inserting data into the DB. Any responses or links for even basic stuff about transactions are welcome. ...
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Is there an Eclipse line-width marker?

...p every code line at 65 characters. I have set up the eclipse Java code formatter properly for this. But what I really want is a vertical line to be drawn in the editor showing where the max line width while I am typing, not just when I run the formmater. I know this feature is available in some cap...
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ASP.NET MVC - Find Absolute Path to the App_Data folder from Controller

...hat is the correct way to find the absolute path to the App_Data folder from a Controller in an ASP.NET MVC project? I'd like to be able to temporarily work with an .xml file and I don't want to hardcode the path. ...
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Do declared properties require a corresponding instance variable?

...ive-C 2.0 require a corresponding instance variable to be declared? For example, I'm used to doing something like this: 6 A...
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PHP Foreach Pass by Reference: Last Element Duplicating? (Bug?)

I just had some very strange behavior with a simple php script I was writing. I reduced it to the minimum necessary to recreate the bug: ...
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Groovy: what's the purpose of “def” in “def x = 0”?

In the following piece of code (taken from the Groovy Semantics Manual page ), why prefix the assignment with the keyword def ? ...
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“Debug only” code that should run only when “turned on”

I would like to add some C# "debug only" code that only runs if the person debugging requests it. In C++, I used to do something similar to the following: ...
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Do I set properties to nil in dealloc when using ARC?

I am trying to learn Automatic Reference Counting in iOS 5. Now the first part of this question should be easy: 2 Answers ...
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Control the size of points in an R scatterplot?

In R, the plot() function takes a pch argument that controls the appearance of the points in the plot. I'm making scatterplots with tens of thousands of points and prefer a small, but not too small dot. Basically, I find pch='.' to be too small, but pch=19 to be too fat. Is there somethin...
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gunicorn autoreload on source change

Finally I migrated my development env from runserver to gunicorn/nginx. 4 Answers 4 ...