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How do I choose grid and block dimensions for CUDA kernels?
... those limits, any kernel you can successfully compile will launch without error.
Performance Tuning:
This is the empirical part. The number of threads per block you choose within the hardware constraints outlined above can and does effect the performance of code running on the hardware. How each co...
Why does Python print unicode characters when the default encoding is ASCII?
... with some bogus encoding:
$ export LC_CTYPE=klingon
# we should get some error message here, just ignore it.
Then start the python shell again and verify that it does indeed revert to its default ascii encoding.
$ python
>>> import sys
>>> print sys.stdout.encoding
ANSI_X3.4-...
Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
....table, too. The := isn't for doing that. So the following is a deliberate error as := isn't for just binding object names :
DT2 := DT # not what := is for, not defined, gives a nice error
:= is for subassigning by reference. But you don't use it like you would in base :
DT[3,"foo"] := newval...
In Firebase, is there a way to get the number of children of a node without loading all the node dat
...tead of event we now have change and context.
The given example throws an error complaining that event.data is undefined. This pattern seems to work better:
exports.countPrescriptions = functions.database.ref(`/prescriptions`).onWrite((change, context) => {
const data = change.after.val();
...
What Makes a Method Thread-safe? What are the rules?
...ion betrayed a lack of understanding about what a local variable is. This error is quite common, but the fact is that it is an error and should be corrected. The definition of a local variable is quite precise and should be treated accordingly. :) This isn't an answer for "people" who don't get ...
How do I get Windows to go as fast as Linux for compiling C++?
...ave enough RAM first): fsutil behavior set memoryusage 2
Check the Windows error log to make sure you aren't experiencing occasional disk errors.
Have a look at Physical Disk related performance counters to see how busy your disks are. High queue lengths or long times per transfer are bad signs.
The...
Convert light frequency to RGB?
... observer (which could be considered to be the "precise" model), there are errors. But from the paper, if you look at the Figure 1 on page 7 (compare (d) with (f)), this method provides quite a close approximation. Especially if you look at (f), you could see that there is also a bluish line even in...
When to use the brace-enclosed initializer?
... value of the object, use copy (=) initialization (because then in case of error, you'll never accidentally invoke an explicit constructor, which generally interprets the provided value differently). In places where copy initialization is not available, see if brace initialization has the correct se...
Can someone explain __all__ in Python?
...oo:
$ cat > run.py
from main import *
foo()
bar()
main() # expected to error here, not exported
$ python run.py
Traceback (most recent call last):
File "run.py", line 4, in <module>
main() # expected to error here, not exported
NameError: name 'main' is not defined
...
How do servlets work? Instantiation, sessions, shared variables and multithreading
...d(). If the determined method is absent from the servlet, then an HTTP 405 error is returned in the response.
The request object provides access to all of the information about the HTTP request, such as its URL, headers, query string and body. The response object provides the ability to control an...