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二分算法（Binary Search） · App Inventor 2 中文网
... 应用介绍
二分算法（Binary Search）是生活中非常常用的折半算法，能解决快速查找、快速定位的问题，主要用到数学和逻辑代码块。
本示例程序演示了采用普通遍历的方式和二分的方式分别需要几次能够猜中随机给出的数...
Arduino控制RGB三色LED灯实验、程序代码、连线图、仿真 - 创客硬件开发 - ...
...含红绿蓝三种，通过控制红（R）、绿(B)、蓝(G)三种颜色的变化使其相互叠加产生花式颜色。而其颜色值的输出是通过PWM来控制的。RGB三基色按照不同的比例相加合成混色称为相加混色，除相加混色法之外还有相减混色法。
PWM控...
App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
...消息队列遥测传输）
MQTT 发明于 1999 年，为物联网设计的轻量级协议，基于TCP协议实现。
MQTT协议文档：https://mqtt.org/
MQTT服务质量（QoS）：3个等级
QoS0：最低质量等级，最多发送一次消息，在消息发出后，接收者不会发...
“信息分享器”误点了始终按钮，还能恢复初始的选择选项吗？ - App应用开发...
Q：分享器打开后原有很多可选的APP，包括微信，地图等等，对话框下有（始终）和（仅一次），误点了（始终），则再次打开就只有一种选择，重新安装后也是如此，换个手机就又好了，但是如再次点击（始终）选择，则这个...
App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
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HC05 简单介绍
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，...
How to bind function arguments without binding this?
...ave to, but I find it more intuitive as a method like bind. You can easily transform it into a function bindArgs(fn){ …, args = slice.call(arguments, 1); …}
– Bergi
May 19 '13 at 20:03
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I do not want to inherit the child opacity from the parent in CSS
...
Opacity is not actually inherited in CSS. It's a post-rendering group transform. In other words, if a <div> has opacity set you render the div and all its kids into a temporary buffer, and then composite that whole buffer into the page with the given opacity setting.
What exactly you wa...
What is a monad?
...on is allowed to return an array with different element types, for example transform an array of numbers into an array of strings or something else. As long as it still an Array.
This can be described a bit more formally using Typescript notation. An array have the type Array<T>, where T is th...
How to join int[] to a character separated string in .NET?
...ple, with different overloads depending on whether you want to specify the transformation or just rely on plain ToString. I've named the method "JoinStrings" instead of "Join" to avoid confusion with the other type of Join. Perhaps someone can come up with a better name :)
using System;
using Syste...
iOS Safari – How to disable overscroll but allow scrollable divs to scroll normally?
...dden;
-webkit-overflow-scrolling: touch;
}
.scrollable * {
-webkit-transform: translate3d(0,0,0);
}
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