大约有 5,100 项符合查询结果（耗时：0.0350秒） [XML]
Difference between `constexpr` and `const`
...during compilation;
constexpr objects and functions may be used in a wider range of contexts than non-constexpr objects and functions;
constexpr is part of an object’s or function’s interface.
Source:
Using constexpr to Improve Security, Performance and Encapsulation in C++.
...
Differences and relationship between glActiveTexture and glBindTexture
...31. But there's one thing you must understand:
THIS IS FALSE!
The actual range that glActiveTexture can take is governed by GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS. That is the maximum number of simultaneous multitextures that an implementation allows. These are each divided up into different grouping...
Should I use px or rem value units in my CSS? [closed]
...oot font-size do actually change the calculated rem values for media query ranges. This can cause some very strange behavior if the font-size of the :root element is changed within a media query. Fortunately the fix is simple: use em units for media queries.
Context Switching
If you switch between...
What is a “cache-friendly” code?
...his excellent documents, you can find detailed examples covering languages ranging from assembly to C++.
If you are into videos, I strongly recommend to have a look at Herb Sutter's talk on machine architecture (youtube) (specifically check 12:00 and onwards!).
Slides about memory optimization by C...
When and why are database joins expensive?
...
What most commenters fail to note is the wide range of join methodologies available in a complex RDBMS, and the denormalisers invariably gloss over the higher cost of maintaining denormalised data. Not every join is based on indexes, and databases have a lot of optimised...
UnicodeDecodeError when redirecting to file
...or: 'ascii' codec can't encode characters in position 0-13: ordinal not in range(128)
Python could not determine encoding (None) so used 'ascii' default. ASCII only supports converting the first 128 characters of Unicode.
Output (redirected to file, PYTHONIOENCODING=cp437)
cp437
and my output...
What is the best Distributed Brute Force countermeasure?
...oesn't fire. If the attacker is using a botnet or has access to a large IP range, our IP throttling is powerless. If the attacker has pre-scraped our userlist (usually possible on open-registration web services), we can't detect an ongoing attack based on number of 'user not found' errors. And if we...
Is there a use-case for singletons with database access in PHP?
...pical intellectual conservatism.
Endless examples can be given for that, ranging from 'globals are evil' to 'iframes are evil'. Back around 10 years ago, even proposing the use of an iframe in any given application was heresy. Then comes Facebook, iframes everywhere, and look what has happened - i...
Why would you use an ivar?
...;< 32) | arc4random();
rnd = rnd % ((max + 1) - min); // Trim it to range
return (rnd + min); // Lift it up to min value
}
static
void createAccounts ( const NSUInteger ammount ) {
NSArray *const maleNames = @[
@"Noah", @"Liam", @"Mason", @"Jacob", @"William",
@"Ethan...
What should main() return in C and C++?
...program. Whether return 0; should be omitted or not is open to debate. The range of valid C program main signatures is much greater.
Efficiency is not an issue with the main function. It can only be entered and left once (marking the program's start and termination) according to the C++ standard....