大约有 3,285 项符合查询结果（耗时：0.0210秒） [XML]
When to use reinterpret_cast?
...apply bitwise operations to (IEEE 754) floats. One example of this was the Fast Inverse Square-Root trick:
https://en.wikipedia.org/wiki/Fast_inverse_square_root#Overview_of_the_code
It treats the binary representation of the float as an integer, shifts it right and subtracts it from a constant, t...
C# Events and Thread Safety
...ifferences among the cases will be especially pronounced since Combine has fast special-case behavior when one of the arguments is null (just return the other), and Remove is very fast when the two arguments are equal (just return null).
– supercat
Oct 21 '13 a...
Circle-Rectangle collision detection (intersection)
...
Here is another solution that's pretty simple to implement (and pretty fast, too). It will catch all intersections, including when the sphere has fully entered the rectangle.
// clamp(value, min, max) - limits value to the range min..max
// Find the closest point to the circle within the recta...
Array or List in Java. Which is faster?
...
I suggest that you use a profiler to test which is faster.
My personal opinion is that you should use Lists.
I work on a large codebase and a previous group of developers used arrays everywhere. It made the code very inflexible. After changing large chunks of it to Lists we...
JOIN queries vs multiple queries
Are JOIN queries faster than several queries? (You run your main query, and then you run many other SELECTs based on the results from your main query)
...
Is there a way to get rid of accents and convert a whole string to regular letters?
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The solution by @virgo47 is very fast, but approximate. The accepted answer uses Normalizer and a regular expression. I wondered what part of the time was taken by Normalizer versus the regular expression, since removing all the non-ASCII characters can be d...
String concatenation: concat() vs “+” operator
... .append(a)
.append(b)
.toString();
The concat method should be faster. However, with more strings the StringBuilder method wins, at least in terms of performance.
The source code of String and StringBuilder (and its package-private base class) is available in src.zip of the Sun JDK. You...
How to concatenate two MP4 files using FFmpeg?
...
Here's a fast (takes less than 1 minute) and lossless way to do this without needing intermediate files:
ls Movie_Part_1.mp4 Movie_Part_2.mp4 | \
perl -ne 'print "file $_"' | \
ffmpeg -f concat -i - -c copy Movie_Joined.mp4
The "ls...
When to use Vanilla JavaScript vs. jQuery?
...e, but you have left off what @Ben notes above. jQuery makes the developer faster and more robust. See this KillClass() implementation that I wrote many years ago and used heavily. You know what? It's broken for certain edge cases. Poor code is poor code, and wrong code is wrong code, but using jQue...
MySQL JOIN the most recent row only?
...etter move the request for the latest row in the where clause. It is a lot faster and looks cleaner.
SELECT c.*,
FROM client AS c
LEFT JOIN client_calling_history AS cch ON cch.client_id = c.client_id
WHERE
cch.cchid = (
SELECT MAX(cchid)
FROM client_calling_history
WHERE clien...