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Is multiplication and division using shift operators in C actually faster?
...ation may help even without fixing the code, but that's not guaranteed.
Strange bitshifting code implementing multiplication or division is far less expressive of what you were conceptually trying to achieve, so other developers will be confused by that, and a confused programmer's more likely to i...
What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
...omes from, and no Q matrix can be accessed.
Armadillo
Advantages:
1. Wide range of decompositions and other functions (including QR).
2. Reasonably fast (uses expression templates), but again, I haven't really pushed it to high dimensions.
Disadvantages:
1. Depends on external BLAS and/or LAPACK f...
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
...t(square)
count = -1 if isquare == square else 0
for candidate in xrange(1, isquare + 1):
if not n % candidate: count += 2
return count
def main(argv):
triangle = 1
index = 1
while factorCount(triangle) < 1001:
index += 1
triangle += index
prin...
How do I determine the size of an object in Python?
...pping, deque
try: # Python 2
zero_depth_bases = (basestring, Number, xrange, bytearray)
iteritems = 'iteritems'
except NameError: # Python 3
zero_depth_bases = (str, bytes, Number, range, bytearray)
iteritems = 'items'
def getsize(obj_0):
"""Recursively iterate to sum size of o...
Learning assembly [closed]
...ng to try their hand at, and hopefully learn something along the way. They range in difficulty from basic (start here!) to impossible.
Above all, you just need to practice. As in many other disciplines, with reverse engineering, practice makes perfect... or at least better.
...
Loop through an array in JavaScript
...an array, you have a question to answer: do you want to loop over the full range indicated by its length and process undefineds for any missing elements, or do you only want to process the elements actually present? There are plenty of applications for both approaches; it just depends on what you're...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
...;setPublicKey();
echo $rsa->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW);
The base64-encoded stuff appears to match even though the header says BEGIN PUBLIC KEY and not BEGIN RSA PUBLIC KEY. So maybe just use str_replace to fix that and you should be good to go!
...
Why does my application spend 24% of its life doing a null check?
...
deep explanatory with wide range of related information, as usual. +1
– Tigran
May 21 '13 at 18:59
1
...
How to parse/format dates with LocalDateTime? (Java 8)
...For instance, the historical Japanese calendars were derived from the time ranges of the reign of the respective emperor or dynasty. Then there is e.g. UNIX timestamp.
Fortunately, the whole (business) world managed to use the same.
Historically, the systems were being switched from/to, for various ...
Why are floating point numbers inaccurate?
...mbers are extremely accurate. They can represent any number in a very wide range with as much as 15 exact digits. For daily life computations, 4 or 5 digits are more than enough. You will never really need those 15, unless you want to count every millisecond of your lifetime.
...