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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）...
PHP validation/regex for URL
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filter_var will reject test-site.com, I have domain names with dashes, wheter they are valid or not. I don't think filter_var is the best way to validate a url. It will allow a url like http://www
– Cesar
Sep 6 '10...
OS X Terminal Colors [closed]
... you want to use.
To generate the LSCOLORS you want to use, checkout this site
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How can I override the OnBeforeUnload dialog and replace it with my own?
...realized, FB's custom message is only available through links inside their site. Not if you simply navigate away...
– Sébastien Richer
Aug 20 '13 at 18:43
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What is the difference between the bridge pattern and the strategy pattern?
I tried to read many articles on dofactory , wikipedia and many sites.
I have no idea on differences between bridge pattern and the strategy pattern.
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Best practices around generating OAuth tokens?
... it. So all the schemes you mentioned would work. Our token evolved as the sites get bigger. Here are the versions we used before,
Our first token is an encrypted BLOB with username, token secret and expiration etc. The problem is that we can't revoke tokens without any record on host.
So we chang...
D Programming Language in the real world? [closed]
...ith meta-programming in D.
video - Conference talk, could not find source site of physicist use.
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Handling specific errors in JavaScript (think exceptions)
... non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
– informatik01
Jul 4 '...
Rails migration for has_and_belongs_to_many join table
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The top answer shows a composite index that I don't believe will be used to lookup apples from oranges.
create_table :apples_oranges, :id => false do |t|
t.references :apple, :null => false
t.references :orange, :null => false
end
# Addi...
Is quoting the value of url() really necessary?
...th usage.
This might feel like that is not important, but high traffic websites prefer to save bandwidth and over lots of css files, and url references in them it make sense to choose the option that make the file smaller...
Even because there is no advantage in not doing so.
Note: you might have ...