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阿里云物联网平台开通及基础用法 - 创客硬件开发 - 清泛IT社区,为创新赋能!
首先是连接阿里云服务器。如何创建产品、设备和topic
重点:${deviceName}在不同的设备中会被替换成对应的名字,例如你在该产品下创建了个 D001 设备,那么该设备的topic就是:
/你自己的Product/D001/user/test
在...
App Inventor 2 如何下载/保存网络图片? - App Inventor 2 中文网 - 清泛...
...行数据交互的场景就要考虑使用它,Web客户端组件在通信连接抽屉中:设置好网络图片的url,然后执行Get方法即可,代码如下:其中,特
首先,需要使用 Web客户端 组件,需要和网络url进行数据交互的场景就要考虑使用它,We...
Android商业模拟器如何使用? - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!
...选择安装apk,完成AI伴侣App的安装并启动它。开始测试:连接 –> AI伴侣,复制 6 位字符码,粘贴到模拟器中的AI伴侣中,点“使用编码连接”即可。
Error “library not found for” after putting application in AdMob
I am getting an error after I put my application in an AdMob. The app was working until today. The error is the following:
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【phpcms v9】PC站和手机站 全静态手机移动站方法 - 更多技术 - 清泛网 - ...
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方法:
一、网站安装
先装好PC站,建好数据库,PC站连接按常规方法,后台站点设置域名就写www.XX.com;新建一个移动站,把phpcms v9全新的网站文件放到移动站下,移动站数据连接和PC的一样,\caches\configs\system.php设置稍微改一...
ld cannot find an existing library
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it did not solve the error cannot fine -LGL . could you please give more information on what libtool does and how it solves library issues?
– Shahryar Saljoughi
May 9 '17 at 10:06
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How to decide font color in white or black depending on background color?
...ove.
The formula given for contrast in the W3C Recommendations is (L1 + 0.05) / (L2 + 0.05), where L1 is the luminance of the lightest color and L2 is the luminance of the darkest on a scale of 0.0-1.0. The luminance of black is 0.0 and white is 1.0, so substituting those values lets you determine ...
static linking only some libraries
...tion to gcc the behavior is to only link static libraries and exit with an error if no static library can be found, even if there is an appropriate dynamic library.
Another option, which I have on several occasions wished gcc had, is what I call -mostly-static and is essentially the opposite of -dy...
Linux进程与线程总结 [推荐] - C/C++ - 清泛网 - 专注C/C++及内核技术
...唯一,建立通话时必须要知道对方的号码,否则无法进行连接。
4.小结:
本文先对Linux下的进程、线程及多进程、多线程进行了简要的介绍和比较,然后实例说明它们实际的使用方法,如何有效地满足并发处理需求,并降低...
C# Stream流使用总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...rt();//启动
Socket sock=lis.AcceptSocket();//阻塞,直到有客户端连接
NetworkStream networkStream = new NetworkStream(sock);//得到Socket中的流
if (netStream.DataAvailable) //如果客户端发送了消息
{
byte[] data = new byte[1024]; //定义一个字节数组,用...