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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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How to avoid scientific notation for large numbers in JavaScript?
JavaScript converts a large INT to scientific notation when the number becomes large. How can I prevent this from happening?
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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 <<...
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...
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...
Why do we need argc while there is always a null at the end of argv?
...cts), you can just omit the parameter name, like this C++ snippet (easy to convert to C):
#include <stdio.h> // C-compatible include, guarantees puts in global namespace
// program will print contents of argv, one item per line, starting from argv[0]
int main(int /*argc*/, char *argv[]) { /...
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...
Extracting specific columns from a data frame
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It convert data frame to list.
– Suat Atan PhD
Jun 21 '17 at 9:42
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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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Best way to parse command-line parameters? [closed]
...alue)
Non-string types of options and properties values (with extendable converters)
Powerful matching on trailing args
Subcommands
And some example code (also from that Github page):
import org.rogach.scallop._;
object Conf extends ScallopConf(List("-c","3","-E","fruit=apple","7.2")) {...