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BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
文章源自：https://www.gandalf.site/2018/11/ble_23.html
参考低功耗蓝牙（BLE）安全初探
0x1 信道BLE的物理通道即“频道，分别是‘f=2402+k*2 MHz, k=0, … ,39’，带宽为2MHz”的40个RF Channel。
其中，有3个信道是advertising channel（广播通道）...
How to print a number with commas as thousands separators in JavaScript
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1933
I'm surprised nobody mentioned Number.prototype.toLocaleString.
It's implemented in JavaScrip...
Is < faster than
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Historically (we're talking the 1980s and early 1990s), there were some architectures in which this was true. The root issue is that integer comparison is inherently implemented via integer subtractions. This gives rise to the following cases.
Comparison ...
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... to uniquely identify a socket. There are two distinct connections between 192.168.1.3 (my workstation) and 54.252.94.236:80 (the remote HTTP server)
TCP 192.168.1.3:63240 54.252.94.236:80 SYN_SENT
TCP 192.168.1.3:63241 54.252.94.236:80 SYN_SENT
TCP 192.168.1.3:...
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...OrderedSame, however in my code I though an exception.
NSArray *sorted = [_scores sortedArrayUsingComparator:^(id obj1, id obj2){
if ([obj1 isKindOfClass:[Score class]] && [obj2 isKindOfClass:[Score class]]) {
Score *s1 = obj1;
Score *s2 = obj2;
if (s1.points &g...
JavaScript for…in vs for
... There's always documentcloud.github.com/underscore which has _.each and a whole lot of other useful functions
– w00t
Nov 29 '11 at 11:01
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How do I use boolean variables in Perl?
...n true and false, so not only does it have booleans, it has true (!0 aka PL_sv_yes) and false (!1 aka PL_sv_no). Or are you saying Perl should croak whenever something other than these two values are tested for truthness? That would be completely awful. e.g. It would prevent $x ||= $default;
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What are queues in jQuery?
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edited Mar 5 '12 at 19:25
Banciur
6566 bronze badges
answered Jun 6 '11 at 7:22
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What is pseudopolynomial time? How does it differ from polynomial time?
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– templatetypedef
Jun 27 '17 at 23:19
1
@AndrewFlemming It depends on how the number is represen...
Malloc vs new — different padding
...en windows and linux. links about gcc: gcc.gnu.org/onlinedocs/gcc/Structure_002dPacking-Pragmas.html
– Stephane Rolland
Nov 20 '12 at 10:01
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