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When to use volatile with multi threading?
...munication that doesn't need any synchronization: it's not publishing that array contents are ready or anything like that. Just a store that's noticed promptly by a not-optimized-away load in another thread.
// global
bool exit_now = false;
// in one thread
while (!exit_now) { do...
Why not be dependently typed?
...m this. Furthermore, vReplicate should be translatable to an actual memory array, something like newtype SVector n x = SVector (Data.Vector.Vector x), where n has kind Nat (or similar). Perhaps another demonstration point for a "dependently-typed show-off?"
– John L
...
Table with fixed header and fixed column on pure css
...or every column in the table, you have to loop through the entire record's array. This HTML works column by column.
– igasparetto
Aug 12 '18 at 9:44
...
Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
...oughput. If your data is hot in L1D cache, the fastest way to popcount an array on Intel CPUs is with AVX2 pshufb. (Ryzen has 4 per clock popcnt throughput so that's probably optimal, but Bulldozer-family has one per 4 clocks popcnt r64,r64 throughput ... agner.org/optimize).
...
Logging best practices [closed]
...levels the information is largely unstructured, so you might find dumps of arrays, stack dumps, etc. Provided you can correlated back to more structured logs at higher levels, things should be okay.
Q: If using files, do you use rolling logs or just a single file? How do you make the logs available...
How to detect a Christmas Tree? [closed]
...rom math import ceil, sqrt
"""
Inputs:
rgbimg: [M,N,3] numpy array containing (uint, 0-255) color image
hueleftthr: Scalar constant to select maximum allowed hue in the
yellow-green region
huerightthr: Scalar constant to select minimum allowed hue i...
Is “double hashing” a password less secure than just hashing it once?
...et's see what happens if we run it a few times around a function:
$tests = array(
"abc",
"def",
"hij",
"klm",
);
foreach ($tests as $test) {
$hash = $test;
for ($i = 0; $i < 100; $i++) {
$hash = ourHash($hash);
}
echo "Hashing $test => $hash\n";
}
That...
What optimizations can GHC be expected to perform reliably?
...h libraries you choose to use).
For example, if you work with Haskell '98 arrays, don't expect any fusion of any kind. But I understand that the vector library has extensive fusion capabilities. It's all about the libraries; the compiler just provides the RULES pragma. (Which is extremely powerful,...
Reference: mod_rewrite, URL rewriting and “pretty links” explained
...t frequently used paths first is okay.
Alternatively you can utilize PHPs array parameters via ?p[]=$1&p[]=$2&p[]=3 query string here - if your script merely prefers them pre-split.
(Though it's more common to just use a catch-all rule, and let the script itself expand the segments out of t...
TLSF源码及算法介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
... area_info_t *area_head;
/* the first-level bitmap */
/* This array should have a size of REAL_FLI bits */
u32_t fl_bitmap;
/* the second-level bitmap */
u32_t sl_bitmap[REAL_FLI];
bhdr_t *matrix[REAL_FLI][MAX_SLI];
} tlsf_t;
/******************************...