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Exact time measurement for performance testing [duplicate]
...Stopwatch();
sw.Start();
// ...
sw.Stop();
Console.WriteLine("Elapsed={0}",sw.Elapsed);
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Bootstrap: Open Another Modal in Modal
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Force unmount of NFS-mounted directory [closed]
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answered Sep 2 '08 at 19:05
tesseintessein
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Invalid argument supplied for foreach()
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530
Personally I find this to be the most clean - not sure if it's the most efficient, mind!
if (is...
Get a random item from a JavaScript array [duplicate]
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edited Mar 26 at 14:06
answered May 6 '11 at 17:50
Ke...
Transaction isolation levels relation with locks on table
.... This means B reads the data under some condition i.e. WHERE aField > 10 AND aField < 20, A inserts data where aField value is between 10 and 20, then B reads the data again and get a different result.
SERIALIZABLE - lock on a full table(on which Select query is fired). This means, B reads th...
How To Save Canvas As An Image With canvas.toDataURL()?
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What is the purpose of setting a key in data.table?
...e other vignettes that we plan to.
I've updated this answer again (Feb 2016) in light of the new on= feature that allows ad-hoc joins as well. See history for earlier (outdated) answers.
What exactly does setkey(DT, a, b) do?
It does two things:
reorders the rows of the data.table DT by the...
Can Visual Studio 2012 be installed side-by-side w/ Visual Studio 2010?
Will Visual Studio 2012 interfere/break .NET 4 and/or Visual Studio 2010 if installed side-by-side on the same instance of Windows?
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Allowed characters in Linux environment variable names
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From The Open Group:
These strings have the form
name=value; names shall not contain
th...