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How do you calculate the average of a set of circular data? [closed]
... Your maths library probably uses Radians for angles. Remember to convert.
– Martin Beckett
Nov 27 '09 at 23:51
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Using bitwise OR 0 to floor a number
...>>, work on signed 32-bit integers. So using bitwise operations will convert a float to an integer.
Does it have any advantages over doing Math.floor? Maybe it's a bit
faster? (pun not intended)
http://jsperf.com/or-vs-floor/2 seems slightly faster
Does it have any disadvantages? M...
How to see indexes for a database or table in MySQL?
...rmance reports tabs you can see all used indexes and unused indexes on the system. or you can fire the query.
select * from sys.schema_index_statistics;
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Python : List of dict, if exists increment a dict value, if not append a new dict
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The second version is good since I can convert the dict as a list after.
– Natim
Nov 7 '09 at 8:32
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Scala: List[Future] to Future[List] disregarding failed futures
I'm looking for a way to convert an arbitrary length list of Futures to a Future of List. I'm using Playframework, so ultimately, what I really want is a Future[Result] , but to make things simpler, let's just say Future[List[Int]] The normal way to do this would be to use Future.sequence(...) ...
How to securely save username/password (local)?
...encrypt a piece of data, use ProtectedData.Protect():
// Data to protect. Convert a string to a byte[] using Encoding.UTF8.GetBytes().
byte[] plaintext;
// Generate additional entropy (will be used as the Initialization vector)
byte[] entropy = new byte[20];
using(RNGCryptoServiceProvider rng = n...
Adding an identity to an existing column
...t can also be used in non-partitioned tables too.
I've used this trick to convert, in under 5 seconds, a column of a of a 2.5 billion row table from IDENTITY to a non-IDENTITY (in order to run a multi-hour query whose query plan worked better for non-IDENTITY columns), and then restored the IDENTIT...
Unresolved reference issue in PyCharm
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@GamesBrainiac, the solution is that the IDE can parse "sys.path.insert(0, "./src")" add that into PYTHONPATH for this specific file, then give proper syntax analysis.
– Ben Lin
Mar 21 '14 at 16:33
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How to use the same C++ code for Android and iOS?
...e by steps
Our sample is a simple app that you send a text to CPP, and it converts that text to something else and returns it. The idea is, iOS will send "Obj-C" and Android will send "Java" from their respective languages, and the CPP code will create a text as a follow "cpp says hello to <<...
Optional Parameters with C++ Macros
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You could get a clear compilation error if you converted the selected argument which is supposed to be a MACRO name to string using # (the pound sign) and compared it's first n characters with the expected prefix and if there is no match, printed an informative error.
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