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How to count the number of set bits in a 32-bit integer?
...ke x86's popcnt, on CPUs where it's supported) will almost certainly be fastest. Some other architectures may have a slow instruction implemented with a microcoded loop that tests a bit per cycle (citation needed).
A pre-populated table lookup method can be very fast if your CPU has a large cache a...
How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
...struct adder<Goal, Goal>{
static unsigned const value = Goal;
};
Testcode:
template<unsigned Start>
struct sum_from{
template<unsigned Goal>
struct to{
template<unsigned N>
struct equals;
typedef equals<adder<Start, Goal>::value> result;
};...
Greenlet Vs. Threads
...t to spawn 60000 native threads or processes to complete the work and this test shows nothing (also did you take the timeout off of the gevent.joinall() call?). Try using a thread pool of about 50 threads, see my answer: stackoverflow.com/a/51932442/34549
– zzzeek
...
Pimpl idiom vs Pure virtual class interface
... dodgy. The answer here is a sensible balance that may also help with unit testing via "dependency injection"; but the answer always depends on requirements. Third party Library writers (as distinct from using a library in your own organization) may heavily prefer the Pimpl.
– ...
How to make a PHP SOAP call using the SoapClient class
...5xah/11593623.zip
The code.
This is what you need to do at PHP side:
(Tested and working)
<?php
// Create Contact class
class Contact {
public function __construct($id, $name)
{
$this->id = $id;
$this->name = $name;
}
}
// Initialize WS with the WSDL
$cli...
SQLAlchemy: print the actual query
...
the second half of the answer has been updated with the latest information.
– zzzeek
Jul 30 '14 at 20:11
2
...
How to determine the content size of a UIWebView?
...ed is that there is no scrolling. Any suggestions?
– testing
Dec 11 '10 at 15:31
1
I found out th...
Force page scroll position to top at page refresh in HTML
...
@Paul12_ - I just tested it on Safari 11.0.3 and works okay for me, which one are you using?
– ProfNandaa
Aug 21 '18 at 23:56
...
What is the difference between memmove and memcpy?
....
You may have noticed that the memmove implementation above doesn't even test if they actually do overlap, it just checks their relative positions, but that alone will make the copy safe. As memcpy usually uses the fastest way possible to copy memory on any system, memmove is usually rather implem...
Using “Object.create” instead of “new”
...though the currently available implementations on Firefox 3.7apre5, the latest WebKit Nightly builds and Chrome 5 Beta, are not so fast compared with plain old constructors, hopefully this will change in the near future. For the object creation, you could create a factory function(i.e. function cre...