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Is there any downside for using a leading double slash to inherit the protocol in a URL? i.e. src=“/
... answered Jan 11 '11 at 19:43
Remy LebeauRemy Lebeau
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Numpy how to iterate over columns of array?
...9,10,8,0], dtype=np.float64).reshape(3, 4)
The function for mean is
def my_mean(x):
return sum(x)/len(x)
To do what is needed and store result in colon vector 'results'
results = np.zeros(4)
for i in range(0, 4):
mat2[:, i] = my_mean(mat2[:, i])
results = mat2[1,:]
The results...
How do I test if a variable is a number in Bash?
I just can't figure out how do I make sure an argument passed to my script is a number or not.
38 Answers
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Get lengths of a list in a jinja2 template
... Internal Server Error: TypeError: object of type 'NoneType' has no len()
My workaround is just displaying 0 if object is None and calculate length of other types, like list in my case:
{{'0' if linked_contacts == None else linked_contacts|length}}
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C# generic “where constraint” with “any generic type” definition?
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Ok, but what should I do if I need to use my generic type T inside the IGarage<TCar>? I can't see any possibility in option2. The best solution would be if IGarage<TCar> found type T by analysing type TCar.
– pt12lol
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How to elegantly rename all keys in a hash in Ruby? [duplicate]
...cessary keys.
Performance considerations:
Based on the Tin Man's answer, my answer is about 20% faster than Jörg W Mittag's answer for a Hash with only two keys. It may get even higher performance for Hashes with many keys, specially if there are just a few keys to be renamed.
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How to get ER model of database from server with Workbench
... way to get an ER model of a database from the server that is connected to my MySQL Workbench?
4 Answers
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Difference between save and saveAndFlush in Spring data jpa
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but, in my project, I use save(), saveAll() & it persists in DB without commit or flush calling explicitly. Then why should I prefer saveAndFlush? FLush mode all those things are in default mode
– P Satish P...
Java 8 stream reverse order
... question has gotten a bit of attention recently, I figure I should update my answer to solve the problem with inserting at the front of ArrayList. This will be horribly inefficient with a large number of elements, requiring O(N^2) copying.
It's preferable to use an ArrayDeque instead, which effici...
How do I base64 encode (decode) in C?
...https://github.com/gaspardpetit/base64/
At this point, I have not limited myself to C algorithms - if one implementation performs well in C++, it can easily be backported to C. Also tests were conducted using Visual Studio 2015. If somebody wants to update this answer with results from clang/gcc, b...