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App Inventor 2 能否实现后台推送通知？源码级深度调研 - App应用开发 - 清...
...知？手机开机不打开 App 就能自动读取云端数据。
以下是源码级深度调研结果。
一、推送通知的工作原理
系统级推送（真推送）
服务器 -> FCM/APNs 云端 -> 手机操作系统 -> App（即使未打开）
关键特征：
1. ...
Using vagrant to run virtual machines with desktop environment
... NikNik
5,48122 gold badges2828 silver badges2323 bronze badges
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What would cause an algorithm to have O(log n) complexity?
...o have that log2 16 = 4. Hmmm... what about 128?
128 / 2 = 64
64 / 2 = 32
32 / 2 = 16
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
This took seven steps, and log2 128 = 7. Is this a coincidence? Nope! There's a good reason for this. Suppose that we divide a number n by 2 i times. Then...
App装到手机上就"失忆"？关于Activity生命周期的7个硬核问答 - A...
...行机制的认知会上一个台阶。
Q1: Activity生命周期到底是什么？App Inventor 2里有对应的概念吗？
A: Activity是Android系统中最基本的UI容器单位，你可以理解为一个"屏幕页面"。Android系统对每个Activity都有一套严格的状态管...
线程访问窗口资源的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...程传入个窗口参数（cwnd），这里里面有个很大的隐患就是当做CWnd::AssertValid()检查，就会遇到断言失败。具...时常为所开的线程传入个窗口参数 （cwnd），这里里面有个很大的隐患就是当做CWnd::AssertValid()检查，就会遇到断言失败...
Maximum length of a table name in MySQL
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64 characters according to this.
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Python base64 data decode
I have the following piece of base64 encoded data, and I want to use python base64 module to extract information from it. It seems that module does not work. Can anyone tell me how?
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How do I manually create a file with a . (dot) prefix in Windows? For example, .htaccess
...OS (COMMAND.COM, 16-bit) is not part of Windows since Windows ME. It's CMD.EXE, 32-bit, which happens to support MS-DOS commands.
– Alan B
Nov 12 '15 at 12:19
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How to run a C# console application with the console hidden
Is there a way to hide the console window when executing a console application?
13 Answers
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Git Bash is extremely slow on Windows 7 x64
...ne '/^\* / s/^\* \(.*\)/ [\1] / p')"
}
PS1='\[\033]0;$MSYSTEM:\w\007
\033[32m\]\u@\h \[\033[33m\w$(fast_git_ps1)\033[0m\]
$ '
This retains the benefit of a colored shell and display of the current branch name (if in a Git repository), but it is significantly faster on my machine, from ~0.75 s to ...