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Pandas - How to flatten a hierarchical index in columns
...test version of pandas. It works with 0.18 but not with 0.20 (latest as of now)
– TH22
Oct 10 '17 at 20:59
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What are type lambdas in Scala and what are their benefits?
... point[A](a: A): M[A]
def bind[A, B](m: M[A])(f: A => M[B]): M[B]
}
Now, Either is a type constructor of two arguments, but to implement Monad, you need to give it a type constructor of one argument. The solution to this is to use a type lambda:
class EitherMonad[A] extends Monad[({type λ[...
Creating an abstract class in Objective-C
I'm originally a Java programmer who now works with Objective-C. I'd like to create an abstract class, but that doesn't appear to be possible in Objective-C. Is this possible?
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How to get Linux console window width in Python
...implementation is in the os module. Also works in Windows.
A backport is now available for Python 3.2 and below:
https://pypi.python.org/pypi/backports.shutil_get_terminal_size
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How to run a python script from IDLE interactive shell?
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As of IDLE 3.7.4, you can now run a module with arguments. Use the new Run -> Run with Customized... command (shortcut Shift+F5) and a popup will open where you can supply your arguments. Unfortunately it doesn't remember them currently so you'll b...
MD5 algorithm in Objective-C
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Thanks! Patched it up now. This was never a problem for me since in the original implementation, I always ran it in a dedicated thread ;)
– Alexander W
Oct 10 '14 at 8:59
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SQLite in Android How to update a specific row
I've been trying to update a specific row for a while now, and it seems that there are two ways to do this. From what I've read and tried, you can just use the:
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javac is not recognized as an internal or external command, operable program or batch file [closed]
...jre). Enter the directory.
Then enter the bin directory of that.
You are now in the correct directory. Copy the path. If in File Explorer, click the address bar. If in Command Prompt, copy the prompt.
The resulting Java path should be in the form of (without quotes):
C:\Program Files\Java\jdkxxx...
Private properties in JavaScript ES6 classes
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By now, this solution is also officially supported in Google Chrome and Node.js v12. Private getters and setters are in development.
– Eyk Rehbein
May 10 '19 at 15:56
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What is the purpose of class methods?
...ou dispatch to a function or static class, then you "forget" and lose the knowledge about which class is doing the initializing.
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