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Does Python optimize tail recursion?
I have the following piece of code which fails with the following error:
6 Answers
6
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Why is “while ( !feof (file) )” always wrong?
... indicator for the stream pointed to by stream, returning nonzero if it is set." (also, an explicit call to clearerr() is the only way to reset this indicator); In this respect, William Pursell's answer is much better.
– Arne Vogel
Sep 10 '18 at 11:53
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What are copy elision and return value optimization?
...t;< "Hello World!\n";
C obj = f();
}
Depending on the compiler & settings, the following outputs are all valid:
Hello World!
A copy was made.
A copy was made.
Hello World!
A copy was made.
Hello World!
This also means fewer objects can be created, so you also can't rely on a s...
Use numpy array in shared memory for multiprocessing
....get_logger().info
def main():
logger = mp.log_to_stderr()
logger.setLevel(logging.INFO)
# create shared array
N, M = 100, 11
shared_arr = mp.Array(ctypes.c_double, N)
arr = tonumpyarray(shared_arr)
# fill with random values
arr[:] = np.random.uniform(size=N)
a...
How to read a file without newlines?
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You can read the whole file and split lines using str.splitlines:
temp = file.read().splitlines()
Or you can strip the newline by hand:
temp = [line[:-1] for line in file]
Note: this last solution only works if the file ends with a newline, o...
How can I repeat a character in Bash?
...ds {1..100} so the command becomes:
printf '=%.0s' 1 2 3 4 ... 100
I've set printf's format to =%.0s which means that it will always print a single = no matter what argument it is given. Therefore it prints 100 =s.
share
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Move capture in lambda
How do I capture by move (also known as rvalue reference) in a C++11 lambda?
6 Answers
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Unicode (UTF-8) reading and writing to files in Python
...encoded in UTF-8). For your second question: \xc3 is not part of the ASCII set. Perhaps you mean "8-bit encoding" instead. You are confused about Unicode and encodings; it's ok, many are.
– tzot
Jan 30 '09 at 12:16
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Automate ssh-keygen -t rsa so it does not ask for a passphrase
... -t rsa with out a password i.e. enter at the prompt.
How can I do that from a shell script?
7 Answers
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Convert a float64 to an int in Go
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