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What is the meaning and difference between subject, user and principal?

...utomation, applications, connections, etc. User - A subset of principal usually referring to a human operator. The distinction is blurring over time because the words "user" or "user ID" are commonly interchanged with "account". However, when you need to make the distinction between the broad clas...
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How do I calculate tables size in Oracle

Being used to (and potentially spoiled by) MSSQL, I'm wondering how I can get at tables size in Oracle 10g. I have googled it so I'm now aware that I may not have as easy an option as sp_spaceused. Still the potential answers I got are most of the time outdated or don't work. Probably because I'm no...
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How do I concatenate two lists in Python?

... @Daniel it will create a new list with a shallow copy of the items in the first list, followed by a shallow copy of the items in the second list. Use copy.deepcopy to get deep copies of lists. – Daniel G Apr 19 '12 at 14:51 ...
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How to list all tags along with the full message in git?

I want git to list all tags along with the full annotation or commit message. Something like this is close: 8 Answers ...
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.NET 4.0 has a new GAC, why?

... Global Assembly Cache (GAC), you will have to manage each of them individually. In .NET Framework 4.0, the GAC went through a few changes. The GAC was split into two, one for each CLR. The CLR version used for both .NET Framework 2.0 and .NET Framework 3.5 is CLR 2.0. There was no need in the prev...
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How do I know if a generator is empty from the start?

..., there is no simple way. There are a whole lot of work-arounds. There really shouldn't be a simple way, because of what generators are: a way to output a sequence of values without holding the sequence in memory. So there's no backward traversal. You could write a has_next function or maybe eve...
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Could not find default endpoint element

... "This error can arise if you are calling the service in a class library and calling the class library from another project." In this case you will need to include the WS configuration settings into the main projects app.config if its a winapp or web.config i...
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Floating point vs integer calculations on modern hardware

... From my experience, there are many, many variables to performance...especially between integer & floating point math. It varies strongly from processor to processor (even within the same family such as x86) because different processors have different "pipeline" lengths. Also, some operations ...
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How to print the ld(linker) search path

...he spot. I have a linking problem, during linking process linker finds manually installed libraries in /usr/local/.. which causes missing library error, and linking fails. I have to rename /usr/local everytime to exclude that search path. Is there a simple way to exclude or override /usr/local path?...
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How do I compare two strings in Perl?

...rldoc perlop for more information. ( I'm simplifying this a little bit as all but cmp return a value that is both an empty string, and a numerically zero value instead of 0, and a value that is both the string '1' and the numeric value 1. These are the same values you will always get from boolean o...