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【转】用App Inventor 2实现电子围栏功能 - App应用开发 - 清泛IT社区，为创新赋能！
在行空板《家庭安全相册》项目中，第四部分是手机APP监护人部分。这部分需要完成手机获取家庭成员传送回来的位置后，计算是否在安全的电子围栏范围内。因为电子围栏是相对复杂的部分，因此独立一章详细说明。
App In...
【App Inventor 2 数据可视化】使用柱状图和饼图收集数据 - App应用开发 - ...
...使人们更容易理解。帮助人们一眼就能看到他们在生活或社区中关心的问题发生了什么。你喜欢用哪些不同方式的图像和图形来理解数据?所有的数据都留在App中，直到你按下Reset按钮。在本系列中，你可以查看以下指南，了解如...
谁在争抢UGC - 资讯 - 清泛网 - 专注C/C++及内核技术
...并重。YouTube、MySpace等网站都可以看做是UGC的成功案例，社区网络、视频分享、博客和播客(视频分享)等都是UGC的主要应用形式。
UGC正在成为互联网领域被十分看好的新的应用和商业模式，甚至形成了一种新的媒体形式，其潜在...
无社交不商业，Uber将边缘化BAT - 资讯 - 清泛网 - 专注C/C++及内核技术
...一个打车软件。他只是以专车切入，去构建并经营强大的社区。并把社区当作强大的市场力量，反向去支配和影响上游的供应链。
而百度、阿里、腾讯（bat），目前垄断中国互联网的三家公司，届时很可能被边缘化，如同传统...
Is it possible to have SSL certificate for IP address, not domain name?
...g Page Speed tool as bible, but anyway that means DNS optimization was not invented by me. I'm just trying to make my Page Speed checklist green where possible.
– Evgenyt
Jan 11 '10 at 18:36
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Architecture of a single-page JavaScript web application?
...r - Because,
-> SPA is not some kind of core technology that is newly invented for which we need to reinvent the wheel for a lot of things that we are doing in application development.
-> Its a concept driven by the need for better performance, availability, scalability and maintainability...
BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区，为创新赋能！
广播和扫描在无线通信中是非常重要的一个技术点。在BLE中，扫描和广播是通信的基础，用户可以直接用扫描和广播进行数据的传输（数据量不大，功耗要求较高的情况下），也可以在广播和扫描的基础上进行连接后点对点通信...
What is BSON and exactly how is it different from JSON?
...BSON and JSON: It talks about some of the problems with JSON, why BSON was invented, what problems it solves compared to JSON and how it could benefit you.
https://www.compose.com/articles/from-json-to-bson-and-back/
In my use case that article told me that serializing to JSON would work for me an...
WebRTC - scalable live stream broadcasting / multicasting
...rm of SRTP, where each session has own encryption key. So unless somebody "invents" or an API allows a way to share one session key between all clients, the multicast is useless.
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Why does the Scala compiler disallow overloaded methods with default arguments?
...ex from the user's perspective. Read other answers and you will see people inventing very complex things just to solve a problem which should not even exist from the users' perspective.
– Richard Gomes
Apr 2 '14 at 19:10
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