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BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...observer（扫描者）。数据包：数据包Access Address为一个32bit的随机值，由Initiator生成。数据包，其实是数据信道上的空中包的简称，数据包只在数据信道上传输，即除37/38/39之外的其余37信道（BLE总共占用40个信道）。每建立一次连...
Temporarily disable auto_now / auto_now_add
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I've recently faced this situation while testing my application. I needed to "force" an expired timestamp. In my case I did the trick by using a queryset update. Like this:
# my model
class FooBar(models.Model):
title = models.CharField(max_lengt...
LINQ to Entities case sensitive comparison
This isn't a case-sensitive comparison in LINQ to Entities:
8 Answers
8
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How can I check if a Perl array contains a particular value?
... to figure out a way of checking for the existence of a value in an array without iterating through the array.
12 Answers
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How do I copy the contents of a String to the clipboard in C#? [duplicate]
... a String, how can I copy that to the clipboard so that the user can paste it into another window (for example, from my application to Notepad)?
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How to compile a static library in Linux?
I have a question: How to compile a static library in Linux with gcc , i.e. I need to compile my source code into a file named out.a. Is it sufficient to simply compile with the command gcc -o out.a out.c ? I'm not quite familiar with gcc , hope anyone can give me a hand.
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jasmine: Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL
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Having an argument in your it function (done in the code below) will cause Jasmine to attempt an async call.
//this block signature will trigger async behavior.
it("should work", function(done){
//...
});
//this block signature will run synchronous...
How can I manually generate a .pyc file from a .py file
...cursively into sub directories and make pyc files for all the python files it finds. The compileall module is part of the python standard library, so you don't need to install anything extra to use it. This works exactly the same way for python2 and python3.
python -m compileall .
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Preferred way to create a Scala list
...e below). You can use a mutable ListBuffer, create a var list and modify it, use a tail recursive method, and probably others that I don't know about.
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How to search a specific value in all tables (PostgreSQL)?
Is it possible to search every column of every table for a particular value in PostgreSQL?
8 Answers
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