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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）...
Get form data in ReactJS
...(this.refs.theInput).value);
}
More info can be found in the React docs:
https://facebook.github.io/react/docs/more-about-refs.html#the-ref-string-attribute
For a lot of the reasons described in How do I use radio buttons in React? this approach isn't always the best, but it does present a useful...
Getting the client's timezone offset in JavaScript
...w Date().toString().match(/([-\+][0-9]+)\s/)[1]
Date.toString reference: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date/toString
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StringIO in Python3
...h a bit to find this; I hope the following helps others.
Python 2.7
See: https://docs.scipy.org/doc/numpy/user/basics.io.genfromtxt.html
import numpy as np
from StringIO import StringIO
data = "1, abc , 2\n 3, xxx, 4"
print type(data)
"""
<type 'str'>
"""
print '\n', np.genfromtxt(String...
Is Chrome's JavaScript console lazy about evaluating arrays?
... able to find an existing unconfirmed Webkit bug that explains this issue: https://bugs.webkit.org/show_bug.cgi?id=35801 (EDIT: now fixed!)
There appears to be some debate regarding just how much of a bug it is and whether it's fixable. It does seem like bad behavior to me. It was especially trou...
How to check in Javascript if one element is contained within another
...use Node.contains, since it's now standard and available in all browsers.
https://developer.mozilla.org/en-US/docs/Web/API/Node.contains
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Single quotes vs. double quotes in Python [closed]
...
Quoting the official docs at https://docs.python.org/2.0/ref/strings.html:
In plain English: String literals can be enclosed in matching single quotes (') or double quotes (").
So there is no difference. Instead, people will tell you to choose whic...
Make a DIV fill an entire table cell
...eight: 100%; }
td { height: 100%; }
td > div { height: 100%; }
Fiddle: https://jsfiddle.net/nh6g5fzv/
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Error 908: Permission Receive SMS - #5 by Taifun - MIT App Inventor Help - MIT App Inventor Community
... after doing a search in the community, you could have found this thread
https://community.appinventor.mit.edu/t/receiving-sms-in-app-inventor/288?u=taifun
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun.
...
What is the pythonic way to avoid default parameters that are empty lists?
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Quote from https://docs.python.org/3/reference/compound_stmts.html#function-definitions
Default parameter values are evaluated from left to right when the function definition is executed. This means that the expression is evaluated onc...