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How is Racket different from Scheme?
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@MaliRemorker I don't understand exactly what you mean, but Scheme is currently on R7RS and was on R6RS. But Racket still out-dos the R6RS feature set.
– CinchBlue
Mar 1 '18 at 0:44
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How to create abstract properties in python abstract classes
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Since Python 3.3 a bug was fixed meaning the property() decorator is now correctly identified as abstract when applied to an abstract method.
Note: Order matters, you have to use @property before @abstractmethod
Python 3.3+: (python docs):
class C(ABC):
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Create a GUID in Java
...e other variants, though it cannot generate them. (In this case, "handle" means construct UUID instances from long, byte[] or String representations, and provide some appropriate accessors.)
The Java UUID Generator (JUG) implementation purports to support "all 3 'official' types of UUID as defined ...
What does “%” (percent) do in PowerShell?
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Where can I find the ForEach-Object meaning in the official documentation on MSDN?
– rightfold
Oct 24 '19 at 18:55
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“On-line” (iterator) algorithms for estimating statistical median, mode, skewness, kurtosis?
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If it is normally distributed, I would use the population sample mean, variance, skewness, and kurtosis as maximum likelihood estimators for a small subset. The (on-line) algorithms to calculate those, you already now. E.g. read in a couple of hundred thousand or million datapoints, until ...
Android ListView not refreshing after notifyDataSetChanged
...e problem is that the ADAPTER'S Item ArrayList was not being updated. This means you can call notifydatasetchanged until your face is blue without any effect. The Adapter is updating your dataset with the same dataset so there are NO changes. Another alternative to the solution posted in this answe...
What does “while True” mean in Python?
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while True means loop forever. The while statement takes an expression and executes the loop body while the expression evaluates to (boolean) "true". True always evaluates to boolean "true" and thus executes the loop body indefinitely. ...
What is Mocking?
...t fail and then go and write the actual development code for it.)
This all means that backend doesn’t have to say: “hey we updated the mocks”...it eventually happens through your code development/debugging. ّBecause it’s all part of the development process! Though if backend provides the...
How to query as GROUP BY in django?
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If you mean to do aggregation you can use the aggregation features of the ORM:
from django.db.models import Count
Members.objects.values('designation').annotate(dcount=Count('designation'))
This results in a query similar to
SEL...
Where does VBA Debug.Print log to?
...see why they named it that instead of some strange logic where "immediate" means "current".
– Rick Henderson
May 10 '16 at 14:49
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