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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
...明书，不要弄错以免烧坏硬件）
一般来说，需要接线的端口有以下4个，无论哪款蓝牙硬件，也无论哪种其他硬件，这4个端口都是基本的存在：VCC（正极）、GND（接地负极）、TX、RX 交叉接线，参考接线如图：
2、串口工具测...
How to enable local network users to access my WAMP sites?
... by default.
Now you should edit the \wamp\bin\apache\apache{version}\conf\extra\httpd-vhosts.conf file. In WAMPServer3.0.6 and above there is actually a menu that will open this file in your editor
left click wampmanager -> Apache -> httpd-vhost.conf
just like the one that has always existse...
linux svn搭建配置及svn命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...svnserve -d -r /opt/svn/repos/ --listen-host 127.0.0.1 （注：不指定端口号，默认为3690）
1、安装
[root@www ~]# yum install subversion
[root@www ~]# svn -v 判断是否安装成功
svnserve, version 1.6.11 (r934486) 出现类型提示，说明安...
C#: how to get first char of a string?
Can the first char of a string be retrieved by doing the following?
13 Answers
13
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C++ multiline string literal
...
Well ... Sort of. The easiest is to just use the fact that adjacent string literals are concatenated by the compiler:
const char *text =
"This text is pretty long, but will be "
"concatenated into just a single string. "
"The disadvantage is that you have to quote "
"each part, and n...
What is the copy-and-swap idiom?
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std::swap(this_string, that) doesn't provide a no-throw guarantee. It provides strong exception safety, but not a no-throw guarantee.
– wilhelmtell
Dec 22 '10 at 14:59
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Viewing my IIS hosted site on other machines on my network
... </bindings>
</site>
...
</sites>
Just add extra lines to reflect your machine IP and designated port
<bindings>
<binding protocol="http" bindingInformation="*:63000:localhost" />
<binding protocol="http" bindingInformation="*:63000:10.0.0.201"...
ros 基本调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...1.简介
2.可用的调试方法
2.1通过文本消息调试
2.1.1串行端口
2.1.1.1虚拟机
2.1.1.2真实电脑——物理串行线
2.1.1.3基于freebsd的串行终端
2.1.2将调试文字输出到文件
2.1.3将调试文字输出到屏幕
2.1.4修改波特率（数据传输速率）
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How to convert a char array to a string?
Converting a C++ string to a char array is pretty straightorward using the c_str function of string and then doing strcpy . However, how to do the opposite?
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How serious is this new ASP.NET security vulnerability and how can I workaround it?
...tain sensitive information like login information in a database connection string, or even link to an automouted sql-express database which you don't want someone to get hold of. But if you are following best practice you use Protected Configuration to encrypt all sensitive data in your web.config.
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