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Create a pointer to two-dimensional array
...0][0][1] = ...;
Because indexing requires the element type's size to be known (indexing implies an addition of an integer to the pointer, so it won't work with incomplete types). Note that this only works in C, because T[] and T[N] are compatible types. C++ does not have a concept of compatible ty...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...irst the printf and then puts and the retq return.
With __builtin_expect
Now replace if (i) with:
if (__builtin_expect(i, 0))
and we get:
0000000000000000 <main>:
0: 48 83 ec 08 sub $0x8,%rsp
4: 31 ff xor %edi,%edi
6: e8 00 0...
Understanding CUDA grid dimensions, block dimensions and threads organization (simple explanation) [
...s 4 multiprocessors and only 4 blocks are
being executed simultaneously).
Now a simple case: processing a 512x512 image
Suppose we want one thread to process one pixel (i,j).
We can use blocks of 64 threads each. Then we need 512*512/64 = 4096 blocks
(so to have 512x512 threads = 4096*64)
It's c...
SQLAlchemy default DateTime
...key=True)
created_date = Column(DateTime, default=datetime.datetime.utcnow)
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How do I parse an ISO 8601-formatted date?
... only) in ambiguous cases. So ONLY use it if you need to parse input of unknown format and are okay to tolerate occasional misreads.
– ivan_pozdeev
Apr 23 '15 at 23:34
2
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Calling parent class __init__ with multiple inheritance, what's the right way?
...super.
[Response question as later edited]
So it seems that unless I know/control the init's of the classes I
inherit from (A and B) I cannot make a safe choice for the class I'm
writing (C).
The referenced article shows how to handle this situation by adding a wrapper class around A and ...
Nested or Inner Class in PHP
...(method_exists($this, $method)) {
/* The method exists so now we want to know if the
* caller is a child of our Package class. If not we throw an exception
* Note: This is a kind of a dirty way of finding out who's
* calling the me...
Python class inherits object
...problem…
Python introduced new-style classes back in Python 2.2, and by now old-style classes are really quite old. Discussion of old-style classes is buried in the 2.x docs, and non-existent in the 3.x docs.
The problem is, the syntax for old-style classes in Python 2.x is the same as the alter...
No module named _sqlite3
...
That's good for Python 2, but pysqlite is now sqlite3 in Python 3, and you can't pip -m install that.
– clabe45
Mar 23 '18 at 23:51
6
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What is in your Mathematica tool bag? [closed]
We all know that Mathematica is great, but it also often lacks critical functionality. What kind of external packages / tools / resources do you use with Mathematica?
...