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GCD to perform task in main thread
I have a callback which might come from any thread. When I get this callback, then I would like to perform a certain task on the main thread.
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How to compute the similarity between two text documents?
...learn. In the latter package, computing cosine similarities is as easy as
from sklearn.feature_extraction.text import TfidfVectorizer
documents = [open(f) for f in text_files]
tfidf = TfidfVectorizer().fit_transform(documents)
# no need to normalize, since Vectorizer will return normalized tf-idf
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How to keep index when using pandas merge
I would like to merge two DataFrames , and keep the index from the first frame as the index on the merged dataset. However, when I do the merge, the resulting DataFrame has integer index. How can I specify that I want to keep the index from the left data frame?
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Parsing JSON from XmlHttpRequest.responseJSON
...irefox addon running with chrome privs, don't try to eval anything you get from an outside source. Instead, use JSON.parse (at least in FF 3.5 and later).
– Ben Combee
Dec 29 '09 at 6:25
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Is there an easy way to create ordinals in C#?
... feminine; maybe some language has also a neutral case (distinguing things from men/animals)
– M.Turrini
Jun 9 '09 at 9:42
2
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Using .NET, how can you find the mime type of a file based on the file signature not the extension
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In Urlmon.dll, there's a function called FindMimeFromData.
From the documentation
MIME type detection, or "data sniffing," refers to the process of determining an appropriate MIME type from binary data. The final result depends on a combination of server-supplied MIME...
In Python how should I test if a variable is None, True or False
..."result pass"
else:
print "result fail"
# execution continues from here, regardless of exception or not
And now you can have a much richer type of notification from the simulate method as to what exactly went wrong, in case you find error/no-error not to be informative enough.
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Calculating days between two dates with Java
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UPDATE: The original answer from 2013 is now outdated because some of the classes have been replaced. The new way of doing this is using the new java.time classes.
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("dd MM yyyy");
String inputString1 =...
Catch a thread's exception in the caller thread in Python
...oversimplifying this, because this seems sufficient for most things to me.
from threading import Thread
class PropagatingThread(Thread):
def run(self):
self.exc = None
try:
if hasattr(self, '_Thread__target'):
# Thread uses name mangling prior to Pyth...
Most useful NLog configurations [closed]
...n strictly configuration suggestions.
Here are some general logging links from here at SO (you might have seen some or all of these already):
log4net vs. Nlog
Logging best practices
What's the point of a logging facade?
Why do loggers recommend using a logger per class?
Use the common pattern ...