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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）...
In Rails - is there a rails method to convert newlines to ?
...Helpers/TextHelper.html#method-i-simple_format
Example:
simple_format(mystring)
Note that simple_format allows basic HTML tags, but also passes text through sanitize which removes all scripts, so it should be safe for user input.
...
Is there a way to add/remove several classes in one single instruction with classList?
... This is interesting to know, but all it does is to edit the string of the class. It wouldnt work if I wanted to remove several classes. Sorry, I forgot to add that in the OP.
– Enrique Moreno Tent
Jun 20 '12 at 9:09
...
Best Practice for Exception Handling in a Windows Forms Application?
...) per thread
Generic Exceptions caught should be published
Log Exception.ToString(); never log only Exception.Message!
Don't catch (Exception) more than once per thread
Don't ever swallow exceptions
Cleanup code should be put in finally blocks
Use "using" everywhere
Don't return special values on er...
Multi-line EditText with Done action button
...: '"textMultiLine"
Normal text keyboard that allow users to input long strings of text that include line breaks (carriage returns).' Therefore the textMultiLine attribute is not appropriate if you want to have the 'Done' button in the keyboard.
A simple way to get a multi-line (in this case 3 l...
Java reflection - impact of setAccessible(true)
... class FieldAccessible {
public static class MyClass {
private String theField;
}
public static void main(String[] args) throws Exception {
MyClass myClass = new MyClass();
Field field1 = myClass.getClass().getDeclaredField("theField");
field1.setAccessib...
What is the maximum size of a web browser's cookie's key?
...on storage planning without implementing a complex limiter algorithm, this string is 4096 ASCII character bytes:
"abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabc...
AI2 Keep Awake
...ly reduced by using this extension. Do not set WakeLocks if you do not really need them, use them as rarely as possible and release them as soon as possible. If actions are to be performed only occasionally, it is not necessary for the CPU to be constantly active. Instead, an alarm can be use...
PHP filesize MB/KB conversion [duplicate]
...Formats filesize in human readable way.
*
* @param file $file
* @return string Formatted Filesize, e.g. "113.24 MB".
*/
function filesize_formatted($file)
{
$bytes = filesize($file);
if ($bytes >= 1073741824) {
return number_format($bytes / 1073741824, 2) . ' GB';
} elsei...
How do I install and use curl on Windows?
...s there a curl.exe file there? Run that. Alternatively, copy curl.exe that and any files that have .dll extension to a directory that is included in your PATH environment variable (or add the directory where curl.exe and the .dll files are, to your PATH environment), and you won't have to type the f...