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Why does X[Y] join of data.tables not allow a full outer join, or a left join?
... suggestion with unique() is a great help. That ought to be in the FAQ. I know Matthew Dowle "designed it for his own use, and he wanted it that way." (FAQ 1.9), but I thought X[Y,all=T] could be an elegant way to specify a full outer join within the data.table X[Y] syntax. Or X[Y,all.x=T] for the ...
How to use glob() to find files recursively?
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@gnibbler I know that is an old comment, but my comment is just to let people know that os.path.walk() is deprecated and has been removed in Python 3.
– Pedro Cunha
Jan 18 '13 at 16:14
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What exactly is an Assembly in C# or .NET?
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@rax: done; @pratik: now you're confusing me: you talk about "multi-file assembly" again, while @GregD mentioned it really was a "multi-assembly file" - what is it now?? (as I said - I've never encountered such a beast, so I'm a bit unclear wheth...
Why is MATLAB so fast in matrix multiplication?
...lementation of BLAS routines which were more and more efficient.
I don't know all the historical implementations (I was not born or a kid back then), but two of the most notable ones came out in the early 2000s: the Intel MKL and GotoBLAS. Your Matlab uses the Intel MKL, which is a very good, optim...
How do you write tests for the argparse portion of a python module? [closed]
...th parameter args=sys.argv[1:]. It already calls the ArgumentParser.parse_known_args-method. With argument args==None it will obtain them with args = _sys.argv[1:] where _sys is an alias for sys. (It might be an update since the answer was posted.)
– Thomas Fauskanger
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CSS transition effect makes image blurry / moves image 1px, in Chrome?
... (counter-)clockwise.
Translate Z-axis to always have a zero value.
Chrome now handles backface-visibility and transform without the -webkit- prefix. I currently don't know how this affects other browsers rendering (FF, IE), so use the non-prefixed versions with caution.
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How to get all subsets of a set? (powerset)
... to for i in range(1, 1 << x).
Returning to this years later, I'd now write it like this:
def powerset(s):
x = len(s)
masks = [1 << i for i in range(x)]
for i in range(1 << x):
yield [ss for mask, ss in zip(masks, s) if i & mask]
And then the test code...
Remove files from Git commit
...to leave them out from the commit:
git reset HEAD path/to/unwanted_file
Now commit again, you can even re-use the same commit message:
git commit -c ORIG_HEAD
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Amazon products API - Looking for basic overview and information
...web service has undergone two name changes in recent history: it was also known as ECS and AAWS.
The signature process you're referring to is the same HMAC signature that all of the other AWS services use for authentication. All that's required to sign your requests to the Product Advertising API is...
Compiling with cython and mingw produces gcc: error: unrecognized command line option '-mno-cygwin'
... error with ld. But this is a different question. I will post it tomorrow. Now need some rest... why is so difficult to compile in windows?
– joaquin
May 17 '11 at 20:54
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