大约有 740 项符合查询结果（耗时：0.0123秒） [XML]
\d is less efficient than [0-9]
...
Gives new timings:
Regex \d took 00:00:00.1355787 result: 5077/10000
Regex [0-9] took 00:00:00.1360403 result: 5077/10000 100.34 % of first
Regex [0123456789] took 00:00:00.1362112 result: 5077/10000 100.47 % of first
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Trying to understand CMTime and CMTimeMake
...000 frames with a timescale of 600 frames per second.
2)
int64_t value = 10000;
int32_t preferredTimeScale = 600;
CMTime inTime = CMTimeMake(value, preferredTimeScale);
CMTimeShow(inTime);
This one gives {10000/600 = 16.667}
Which means a total duration of 16.667 seconds, with 10000 frames with...
Test if characters are in a string
...ng, try finding 1 match in a bunch of shorter strings: vec <- replicate(100000, paste( sample(letters, 10, replace=TRUE), collapse='') ).
– Greg Snow
Apr 12 '12 at 19:52
2
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How to detect shake event with android?
... float speed = Math.abs(x+y+z - last_x - last_y - last_z) / diffTime * 10000;
if (speed > SHAKE_THRESHOLD) {
Log.d("sensor", "shake detected w/ speed: " + speed);
Toast.makeText(this, "shake detected w/ speed: " + speed, Toast.LENGTH_SHORT).show();
}
last_x ...
Error java.lang.OutOfMemoryError: GC overhead limit exceeded
...st = new ArrayList<Double>();
for (int outer = 0; outer < 10000; outer++) {
// list = new ArrayList<Double>(10000); // BAD
// list = new ArrayList<Double>(); // WORSE
list.clear(); // BETTER
for (int inner = 0; inner <...
Remove an element from a Bash array
...Current(seconds) Speedup
1000 10 0.005 0.033 6X
10000 10 0.070 0.348 5X
10000 20 0.070 0.656 9X
10000 1 0.043 0.050 -7%
As expected, the current solution is linear to N*K, and the fast solution i...
How to reset index in a pandas dataframe? [duplicate]
...df = pd.DataFrame({'a':[8,7], 'c':[2,4]}, index=[7,8])
df = pd.concat([df]*10000)
print (df.head())
In [298]: %timeit df1 = df.reset_index(drop=True)
The slowest run took 7.26 times longer than the fastest. This could mean that an intermediate result is being cached.
10000 loops, best of 3: 105 µs...
SQL中使用update inner join和delete inner join；Oracle delete join替代...
...m A a inner join B b on a.num2 = b.num1
where b.num2 not between '10'and '10000') 这段sql如何优化，不使用in？
1. 用exists 来替代 in
delete from A where exists
(select 1 from B b where A.num2 = b.num1
where b.num2 not between '10' and '10000');
不过你用not between，...
Eclipse CDT利用gdbserver远程调试 - C/C++ - 清泛网 - 专注C/C++及内核技术
...标机器上启动gdbserver：ps -elf | grep (process)gdbserver --attach :10000 (pid)2、调试机器上启动Eclipse Attach模式：场景：调试机器A，目标机器B
1、目标机器上启动gdbserver，attach需要调试的进程：
ps -elf | grep (process)
gdbserver --attach :10000 (p...
Cartesian product of x and y array points into single array of 2D points
...
repeat_product:
67.5 µs ± 633 ns per loop (mean ± std. dev. of 7 runs, 10000 loops each)
dstack_product:
67.7 µs ± 1.09 µs per loop (mean ± std. dev. of 7 runs, 10000 loops each)
cartesian_product:
33.4 µs ± 558 ns per loop (mean ± std. dev. of 7 runs, 10000 loops each)
cartesian_product_...