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HC-05 蓝牙模块开发 - 创客硬件开发 - 清泛IT社区，为创新赋能！
它有六个引脚，引脚的作用如下：
通过厂商App连接串口测试，发现HC-05模块是经典蓝牙2.0，并不支持蓝牙5.0（低功耗BLE），它需要配对码进行配对，App Inventor 2 中使用“蓝牙客户端”组件，而非BLE拓展，必须在手机设置中...
短信验证码输入比对逻辑编写 - App应用开发 - 清泛IT社区，为创新赋能！
短信验证码验证，这样编写能否实现验证码的比对识别啊，不行的话要怎么进行编写呢就是把输入到文本框4中的验证码与收到的验证码进行比较，验证是否正确，如果正确的话则跳转到下一个屏幕问题在于你的验证码生成了2次...
How to specify a port number in SQL Server connection string?
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I just wasted nearly a whole day trying to figure this out. Someone at Microsoft should be shot for this. Not only do they take it upon t...
What is Java Servlet?
...rvlet Specification.
Simple Servlet example.
Start reading the book online/PDF
It also provides you download of the whole book. May be this will help.
if you are just starting servlets may be it's a good idea to read the material along with the servlet API. it's a slower process of learning, but is ...
Keystore type: which one to use?
...urther reading:
Mind Your Keys? A Security Evaluation of Java Keystores (PDF)
Java KeyStores – the gory details
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How do I get a value of datetime.today() in Python that is “timezone aware”?
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In Python 3, the standard library makes it much easier to specify UTC as the timezone:
>>...
“CAUTION: provisional headers are shown” in Chrome debugger
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Willington VegaWillington Vega
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click or change event on radio using jquery
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You can specify the name attribute as below:
$( 'input[name="testGroup"]:radio' ).change(
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CListCtrl 扩展风格设置方法：SetExtendedStyle和ModifyStyleEx 区别 - C++...
对于初学者来说，当他需要设定listctrl的扩展风格时，常常想到用ModifyStyleEx 来设定，代码如下：ModifyStyleEx(0,LVS_EX_GRIDLINES)
这是不正确的，正确的设定应该是：SetExtendedStyle(LVS_EX_GRIDLINES)
那么，ModifyStyleEx和S...
What is an efficient way to implement a singleton pattern in Java? [closed]
... video. Also see slides 30-32 of his presentation (effective_java_reloaded.pdf):
The Right Way to Implement a Serializable Singleton
public enum Elvis {
INSTANCE;
private final String[] favoriteSongs =
{ "Hound Dog", "Heartbreak Hotel" };
public void printFavorites() {
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