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BLE数据收发 20个字节的限制问题 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...ed 事件将被触发。默认 MTU 为 20。
来源中文文档：https://www.fun123.cn/reference/iot/bluetoothle.html
App Inventor 2 发表于 2024-11-07 17:28
RequestMTU – 为 BluetoothLE 连接请求新的最大传输单元 (MTU)。此功能仅在两个设备都支持蓝牙 4.2 ...
How to create a memory leak in Java?
...om which you can't remove
str.intern();
(Unclosed) open streams ( file , network etc... )
try {
BufferedReader br = new BufferedReader(new FileReader(inputFile));
...
...
} catch (Exception e) {
e.printStacktrace();
}
Unclosed connections
try {
Connection conn = ConnectionF...
How to check if a user is logged in (how to properly use user.is_authenticated)?
...auth:
# Only for authenticated users.
For more info visit https://www.django-rest-framework.org/api-guide/requests/#auth
request.user.is_authenticated() has been removed in Django 2.0+ versions.
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How to add a custom Ribbon tab using VBA?
.....)
By the way the page that explains it on Ron's site is now at
http://www.rondebruin.nl/win/s2/win002.htm
And here is his example on how you enable /disable buttons on the Ribbon
http://www.rondebruin.nl/win/s2/win013.htm
For other xml examples of ribbons please also see
http://msdn.microsoft...
PHP_SELF vs PATH_INFO vs SCRIPT_NAME vs REQUEST_URI
... However, I don't like to see index.php in the URI. For example, http://www.example.com/faq/whatever will route to http://www.example.com/index.php/faq/whatever . I need a reliable way for a script to know what it's address is, so it will know what to do with the navigation. I've used mod_rewr...
How to make a chain of function decorators?
...
# If you are not familiar with unpacking, check:
# http://www.saltycrane.com/blog/2008/01/how-to-use-args-and-kwargs-in-python/
function_to_decorate(*args, **kwargs)
return a_wrapper_accepting_arbitrary_arguments
@a_decorator_passing_arbitrary_arguments
def function_wit...
How to go up a level in the src path of a URL in HTML?
...server any place other than the specified web folders.
Eg. does not work: www.mywebsite.com/../images
As a workaround, I use Symlinks:
Go to the directory of www.mywebsite.com
Run the command ln -s ../images images
Now www.mywebsite.com/images will point to www.mywebsite.com/../images
...
Class type check in TypeScript
...sFish(pet)) {
pet.swim();
}
else {
pet.fly();
}
See more at:
https://www.typescriptlang.org/docs/handbook/advanced-types.html
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What does Connect.js methodOverride do?
...
And the source should be http://www.senchalabs.org/connect/methodOverride.html
– ilyaigpetrov
May 21 '13 at 6:45
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...
Is there a regular expression to detect a valid regular expression?
...?\)|\(\?(?:R|[+-]?\d+)\))(?:(?:[?+*]|\{\d+(?:,\d*)?\})[?+]?)?|\|)*)$/
.NET does not support recursion directly. (The (?1) and (?R) constructs.) The recursion would have to be converted to counting balanced groups:
^ # start of string
(?:
(?: [^?+*{}()[\...