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App Inventor 2 字典代码块 · App Inventor 2 中文网
...果要对数据结构执行大量的操作，建议优先使用字典。
显示字典的常见方法是使用 JavaScript 对象表示法 (JSON)，例如：
{
"id": 1,
"name": "Tim the Beaver",
"school": {
"name": "Massachusetts Institute of Technology"
},
"enrolled": true,
"class...
Lost connection to MySQL server at 'reading initial communication packet', system error: 0
...ggests that it might be because the MySQL server is bound to the loop-back IP (127.0.0.1 / localhost) which effectively cuts you off from connecting from "outside".
If this is the case, you need to upload the script to the webserver (which is probably also running the MySQL server) and keep your se...
为AppInventor2开发自己的拓展(Extension) - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
...加上配置完成后点击确定；cmd打开命令行，java -version ，显示java jdk的版本，配置成功配置ant：ant用来将你的写完的自定义的Extension打包成aix文件，打包完成以后可以直接导入到app inventor中使用ANT_HOME 存放你ant的目录 path  ...
How Can I Download a File from EC2 [closed]
...
Use scp:
scp -i ec2key.pem username@ec2ip:/path/to/file .
where:
ec2key.pem is your PEM key
username is the username you log in with
ec2ip is the IP or DNS alias of the instance
/path/to/file is the location where the file is stored
This will copy the file i...
libcurl网络连接使用tcp/ip - C/C++ - 清泛网 - 专注C/C++及内核技术
libcurl网络连接使用tcp/iplibcurl网络连接使用tcp ip，部分代码如下：CURL *curl;CURLcode res;const char *request = "GETas.xxxxE测试发送"; curl_socket_t sockfd; * socket * ...部分代码如下：
CURL *curl;
CURLcode res;
const char *request = "GETas.xxxxE测试发送";
...
VC IP地址控件（CIPAddressCtrl ）的自绘 - C/C++ - 清泛网 - 专注C/C++及内核技术
VC IP地址控件（CIPAddressCtrl ）的自绘先看效果图：代码：.h#pragma once class CMyIPCtrl : public CIPAddressCtrl{DECLARE_DYNAMIC(CMyIPCtrl)public:CMyIPCtrl();virtua...先看效果图：
代码：
.h
#pragma once
class CMyIPCtrl : public CIPAddressCtrl
{
DECLARE_DYNAMI...
ssh: The authenticity of host 'hostname' can't be established
...prompts to say "yes" or "no". This cause some trouble when running from scripts that automatically ssh to other machines.
1...
How to resolve “Waiting for Debugger” message?
I have HTC Comet connected to Eclipse with SDK 2.2. I do a debug build - the application does not run; though it does get installed on the device. On the device I get this message box on the Comet screen
...
从Sloodle看三维虚拟学习环境的发展趋势 - 资讯 - 清泛网 - 专注C/C++及内核技术
...教育技术研究工作者将兴趣投入到 MUVE上 ,并有调查研究显示这其中很多人是通过 SL才接触到 MUVE的 (NMC, 2007)。SL是一个模拟真实世界的大型多人在线角色扮演平台 ,巧妙融合了联网游戏和在线虚拟社区的诸多概念 ,创造了一种新型...
When is it appropriate to use UDP instead of TCP? [closed]
...nt your own protocol for reliability or to resend. DNS is the perfect description of this use case. The costs of connection setups are way too high (yet, DNS
does support a TCP mode as well).
Another case is when you are delivering data that can be lost because newer data coming in will replace tha...