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How do you calculate the average of a set of circular data? [closed]
I want to calculate the average of a set of circular data. For example, I might have several samples from the reading of a compass. The problem of course is how to deal with the wraparound. The same algorithm might be useful for a clockface.
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/usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found
...
I'm compiling gcc 4.6 from source, and apparently
sudo make install
didn't catch this one. I dug around and found
gcc/trunk/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs/libstdc++.so.6.0.15
I copied it in to /usr/lib and redirected libstdc++.so.6 to point to the new one, and now e...
How do we control web page caching, across all browsers?
...he request, so you don't need to specify it at all.
How to set it?
Using PHP:
header("Cache-Control: no-cache, no-store, must-revalidate"); // HTTP 1.1.
header("Pragma: no-cache"); // HTTP 1.0.
header("Expires: 0"); // Proxies.
Using Java Servlet, or Node.js:
response.setHeader("Cache-Control"...
Best way to do Version Control for MS Excel
...odule.Name
.VBComponents(i%).Export "X:\Tools\MyExcelMacros\" & sName$ & ".vba"
End If
Next i
End With
End Sub
Sub ImportCodeModules()
With ThisWorkbook.VBProject
For i% = 1 To .VBComponents.Count
ModuleName = .VBComponents(i%).CodeModule.Name
...
How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer? [closed]
...ry (C:\JDK in this case)
Download latest version of JDK from Oracle (for example jdk-7u7-windows-x64.exe)
Download and install 7-Zip (or download 7-Zip portable version if you are not administrator)
With 7-Zip extract all the files from jdk-XuXX-windows-x64.exe into the directory C:\JDK
Execute the ...
Is there a null-coalescing (Elvis) operator or safe navigation operator in javascript?
I'll explain by example:
21 Answers
21
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Standard way to embed version into python package?
...is also used in lots of 3rd-party modules, so it's the quasi-standard.
Usually, __version__ is a string, but sometimes it's also a float or tuple.
Edit: as mentioned by S.Lott (Thank you!), PEP 8 says it explicitly:
Module Level Dunder Names
Module level "dunders" (i.e. names with two lea...
Is it safe to use -1 to set all bits to true?
...s one:
unsigned long a = ~0u;
It won't necessarily store a pattern with all bits 1 into a. But it will first create a pattern with all bits 1 in an unsigned int, and then assign it to a. What happens when unsigned long has more bits is that not all of those are 1.
And consider this one, which wi...
How to loop through a plain JavaScript object with the objects as members?
...te that this is only necessary if your object HAS prototype methods. For example, if the object you're looping through is just a JSON object, you won't need this check.
– gitaarik
Dec 29 '13 at 19:46
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Set transparent background using ImageMagick and commandline prompt
...color and white background. like trump photos.
– Sr. PHP Programmer Team Lead
Nov 27 '19 at 5:24
For white on white, t...