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micro:bit 微控制器教程 · App Inventor 2 中文网
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教程概述
本教程将指导您如何使用 App Inventor 2 通过蓝牙连接和控制 micro:bit 微控制器。您将学会：
蓝牙连接 micro:bit 设备
读取 micro:bit 传感器数据（如温度传感器）
向 micro:bit 发送控制指令
双...
TCPServer TCP服务器扩展：在Android设备上创建TCP服务器 · App Inventor 2 中文网
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方法 Methods
事件 Events
使用示例
示例项目功能
基本用法
代码示例
注意事项
错误代码
原文链接
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TCPServer TCP服...
Get user info via Google API
...t the information from - https://www.googleapis.com/oauth2/v1/userinfo?alt=json
It has loads of stuff - including name, public profile url, gender, photo etc.
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移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...白了viewport的概念以及弄清楚了跟viewport有关的meta标签的使用，才能更好地让我们的网页适配或响应各种不同分辨率的移动设备。
一、viewport的概念
通俗的讲，移动设备上的viewport就是设备的屏幕上能用来显示我们的网页的那...
解决：CTreeCtrl控件SetCheck无效的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...选择状态。
但是奇怪的是，在对话框中按照常规的方法使用了SetCheck，最后CTreeCtrl并没有显示节点被选
中，下面是测试例子：
1、用wizard创建一个对话框工程，并且在上面放置一个CTreeCtrl控件。
2、设置CTreeCtrl的属性，"Mo...
What is Rack middleware?
... any of them will do. Let's create a simple web application that returns a JSON string. For this we'll create a file called config.ru. The config.ru will automatically be called by the rack gem's command rackup which will simply run the contents of the config.ru in a rack-compliant webserver. So let...
Getting visitors country from their IP
..._VALIDATE_IP) && in_array($purpose, $support)) {
$ipdat = @json_decode(file_get_contents("http://www.geoplugin.net/json.gp?ip=" . $ip));
if (@strlen(trim($ipdat->geoplugin_countryCode)) == 2) {
switch ($purpose) {
case "location":
...
jQuery pass more parameters into callback
...sh to pass.
$.post("someurl.php", someData, doSomething(extraStuff), "json");
};
What is happening?
In the last line, doSomething(extraStuff) is invoked and the result of that invocation is a function pointer.
Because extraStuff is passed as an argument to doSomething it is within scope of ...
appending array to FormData and send via AJAX
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You have several options:
Convert it to a JSON string, then parse it in PHP (recommended)
JS
var json_arr = JSON.stringify(arr);
PHP
$arr = json_decode($_POST['arr']);
Or use @Curios's method
Sending an array via FormData.
Not recommended: Serialize the data with...
How to serialize Joda DateTime with Jackson JSON processor?
...
In the object you're mapping:
@JsonSerialize(using = CustomDateSerializer.class)
public DateTime getDate() { ... }
In CustomDateSerializer:
public class CustomDateSerializer extends JsonSerializer<DateTime> {
private static DateTimeFormatter ...