大约有 744 项符合查询结果（耗时：0.0165秒） [XML]
Rolling median algorithm in C
........................................
if __name__ == "__main__":
Len = 10000
window = 3
nlevel = 256
period = 100
np.set_printoptions( 2, threshold=100, edgeitems=10 )
# print medians( np.arange(3), 3 )
sinwave = (np.sin( 2 * np.pi * np.arange(Len) / period )
+ ...
Is gcc std::unordered_map implementation slow? If so - why?
... << " " << m << std::endl;
}
I used a SIZE of 10000000, and had to change things a bit for my version of boost. Also note, I pre-sized the hash table to match SIZE/DEPTH, where DEPTH is an estimate of the length of the bucket chain due to hash collisions.
Edit: Howard p...
How can I plot with 2 different y-axes?
... second data set on a very different scale
z <- runif(10, min=1000, max=10000)
par(mar = c(5, 4, 4, 4) + 0.3) # Leave space for z axis
plot(x, y) # first plot
par(new = TRUE)
plot(x, z, type = "l", axes = FALSE, bty = "n", xlab = "", ylab = "")
axis(side=4, at = pretty(range(z)))
mtext("z", sid...
Evaluating a mathematical expression in a string
... Note that ast.parse is not safe. For example ast.parse('()' * 1000000, '<string>', 'single') crashes the interpreter.
– Antti Haapala
Apr 29 '16 at 9:43
1
...
How can I repeat a character in Bash?
...avoid the multi-utility, awk, and perl solutions.
Large repeat count: 1000000 (1 million)
[M ] Perl [sid_com]: 0.0067
[M ] mawk - $(count+1)="=" [Steven Penny (variant)]: 0.0254
[M ] gawk - $(count+1)="=" [Steven Penny (variant)]: 0.0599
[S ] head + ...
SQL NVARCHAR and VARCHAR Limits
...;`
Returns
-------------------- --------------------
8000 10000
Note that @A encountered truncation.
How to resolve the problem you are experiencing.
You are getting truncation either because you are concatenating two non max datatypes together or because you are concatenating a va...
Performance of FOR vs FOREACH in PHP
...decided to do a quick benchmark run...
$a = array();
for ($i = 0; $i < 10000; $i++) {
$a[] = $i;
}
$start = microtime(true);
foreach ($a as $k => $v) {
$a[$k] = $v + 1;
}
echo "Completed in ", microtime(true) - $start, " Seconds\n";
$start = microtime(true);
foreach ($a as $k => ...
How does RegexOptions.Compiled work?
... i = 0;
TimeAction(item.Name + " prepared interpreted match (x1000000)", 1000000, () =>
{
regex.Match(item.Matches[i++ % item.Matches.Length]);
});
regex = new Regex(item.Pattern, RegexOptions.Compiled);
i = 0;
TimeAction(item.Name...
Generate all permutations of a list without adjacent equal elements
...(lst))
print(lst, fast, slow)
assert slow == fast
for r in range(10000):
test([randrange(3) for i in range(randrange(6))])
share
|
improve this answer
|
follow...
Explicitly calling return in a function or not
...r(length=x,mode="numeric")))(x)
,repeats)) }
maxlen <- 1000
reps <- 10000
along <- seq(from=1,to=maxlen,by=5)
ret <- sapply(along,FUN=bench_ret2,repeats=reps)
nor <- sapply(along,FUN=bench_nor2,repeats=reps)
res <- data.frame(N=along,ELAPSED_RET=ret["elapsed",],ELAPSED_NOR=nor["el...