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【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...事情非常多，比如具体选择哪个射频通道进行通信，怎么识别空中数据包，具体在哪个时间点把数据包发送出去，怎么保证数据的完整性，ACK如何接收，如何进行重传，以及如何对链路进行管理和控制等等。LL层只负责把数据发...
Eclipse Android and gitignore
...
There are file types to ignore
# built application files
*.apk
*.ap_
# files for the dex VM
*.dex
# Java class files
*.class
# generated files
bin/
gen/
# Local configuration file (sdk path, etc)
local.properties
# Eclipse project files
.classpath
.project
#...
Linux/Unix command to determine if process is running?
...x | grep command
The output on Gentoo Linux:
14484 ? S 0:00 apache2
14667 ? S 0:00 apache2
19620 ? Sl 0:00 apache2
21132 ? Ss 0:04 apache2
The output on OS X:
42582 ?? Z 0:00.00 (smbclient)
46529 ?? Z 0:00.00 (smbclient)
46539 ??...
Extract substring using regexp in plain bash
...ash
\s* any space characters (any whitespace character)
\( start capture group
\S* any non-space characters
\) end capture group
.*$ anything at the end
\1 substitute 1st capture group for everything on line
p print it
...
淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...数据层可以给数据打上特殊的标来区分。目的都是把已经识别出来的热点和普通请求区分开来。
动静分离
前面介绍在系统层面上的原则是要做隔离，接下去就是要把热点数据进行动静分离，这也是解决大流量系统的一个重要...
How do I get an apk file from an Android device?
How do I get the apk file from an android device? Or how do I transfer the apk file from device to system?
24 Answers
...
Can someone explain the traverse function in Haskell?
...explain it to me in terms of an imperative loop? Pseudo-code would be much appreciated. Thanks.
5 Answers
...
Explaining Apache ZooKeeper
...rying to understand ZooKeeper, how it works and what it does. Is there any application which is comparable to ZooKeeper?
5...
Which “href” value should I use for JavaScript links, “#” or “javascript:void(0)”?
...s an error. Hence the developers have to also remember to handle any error appropriately in the called function.
A third reason is that there are cases where the onclick event property is assigned dynamically. I prefer to be able to call a function or assign it dynamically without having to code t...
Notifier 通知扩展：功能强大的Android通知管理工具，支持通知通道、意图、...
...关闭，例如通过应用程序概览（历史记录），应用程序会识别到这一点。因此不会创建闹钟。这种情况通过在应用程序启动时设置闹钟并重复延迟来覆盖。如果应用程序通过外部机制关闭，常规延迟不再适用，闹钟在预期时间触...