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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，...
...令信息，并将指令打包成合适的profile。GAP层： 向上提供API，向下合理分配各个层工作。
0x31 Physical Layer任何一个通信系统，首先要确定的就是通信介质（物理通道，Physical Channel），BLE也不例外。在BLE协议中，“通信介质”的定...
What is the use of ByteBuffer in Java? [closed]
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even if it's just a copy of the api doc its even worht its score bcs some people seem to be too lazy to take a look at it.
– Chris
Feb 10 '14 at 16:23
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Daylight saving time and time zone best practices [closed]
...hanged from the original value recorded.
When scheduling future events, usually local time is preferred instead of UTC, as it is common for the offset to change. See answer, and blog post.
When storing whole dates, such as birthdays and anniversaries, do not convert to UTC or any other time zone.
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How can I get the URL of the current tab from a Google Chrome extension?
... tabs => {
let url = tabs[0].url;
// use `url` here inside the callback because it's asynchronous!
});
This requires that you request access to the chrome.tabs API in your extension manifest:
"permissions": [ ...
"tabs"
]
It's important to note that the definition of your "current...
Returning 'IList' vs 'ICollection' vs 'Collection'
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Generally you should return a type that is as general as possible, i.e. one that knows just enough of the returned data that the consumer needs to use. That way you have greater freedom to change the implementation of the API, wit...
Maximum size of a element
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Updated 10/13/2014
All tested browsers have limits to the height/width of canvas elements, but many browsers also limit the total area of the canvas element. The limits are as follows for the browsers I'm able to test:
Chrome:
Maximum height/...
Standard Android Button with a different color
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I discovered that this can all be done in one file fairly easily. Put something like the following code in a file named custom_button.xml and then set background="@drawable/custom_button" in your button view:
<?xml version="1.0" encoding="utf-8"?&...
How to run Rails console in the test environment and load test_helper.rb?
...other tests. I'd like to go to the console and run different Factory Girl calls to check out what's happening. For example, I'd like to go in there are do...
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Unable to add window — token android.os.BinderProxy is not valid; is your activity running?
...ary spins off the auth operation asynchronously, and you have a Handler - Callback mechanism (onComplete called on a listener) that could easily create this scenario.
When I've seen this reported in my app, its pretty rare and matches the experience in the blog post. Something went wrong for the ac...
Node.js check if path is file or directory
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Note that the asynchronous version is usually preferable if you care about general app performance.
– AlexMA
Mar 14 '14 at 20:10
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