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Which parallel sorting algorithm has the best average case performance?
...) processors we would hope for a linear speedup. O(log n) parallel algorithms exist but they have a very high constant. They also aren't applicable on commodity hardware which doesn't have anywhere near O(n) processors. With p processors, reasonable algorithms should take O(n/p log n) time.
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Alter table add multiple columns ms sql
Can anyone tell me where is the mistake in the following query
6 Answers
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How to implement a unique index on two columns in rails
I have a table and I'm trying to add a unique index on two columns. Those columns are also indexed. So my question is if I just can remove the indexes who were just for one column or if I have to use all three indexes:
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How can I change the copyright template in Xcode 4?
Does anyone know how to change copyright in the templates for Xcode? That is, at the top of a new file it writes:
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Applications are expected to have a root view controller at the end of application launch
I get the following error in my console:
49 Answers
49
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What is the difference between origin and upstream on GitHub?
What is the difference between origin and upstream on GitHub ?
1 Answer
1
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How can I filter a Django query with a list of values?
I'm sure this is a trivial operation, but I can't figure out how it's done.
3 Answers
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How can I see the current value of my $PATH variable on OS X?
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You need to use the command echo $PATH to display the PATH variable or you can just execute set or env to display all of your environment variables.
By typing $PATH you tried to run your PATH variable contents as a command name.
Bash displayed t...
What is the difference between os.path.basename() and os.path.dirname()?
What is the difference between os.path.basename() and os.path.dirname() ?
2 Answers
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how do I work around log4net keeping changing publickeytoken
We have an asp.net 4.0 project which uses a couple of frameworks which is dependent on log4net version 1.2.10.0. Today I tried to include a new framework which is dependent on log4net version 1.2.11.0, I've been stuck ever since:
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