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^M at the end of every line in vim
...sy way to strip out the DOS line endings is to use the ff option:
:set ff=unix
:wq
Now your file is back to the good-old-Unix-way.
If you want to add the DOS line-endings (to keep a printer happy, or transfer files with Windows friends who don't have nice tools) you can go the opposite direction...
Add up a column of numbers at the Unix shell
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... | paste -sd+ - | bc
is the shortest one I've found (from the UNIX Command Line blog).
Edit: added the - argument for portability, thanks @Dogbert and @Owen.
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How to convert the ^M linebreak to 'normal' linebreak in a file opened in vim?
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:e ++ff=dos followed by :set ff=unix will convert the endings to a sane format.
– Mateen Ulhaq
Mar 2 '18 at 2:22
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Why number 9 in kill -9 command in unix? [closed]
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See the wikipedia article on Unix signals for the list of other signals. SIGKILL just happened to get the number 9.
You can as well use the mnemonics, as the numbers:
kill -SIGKILL pid
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使用虚拟现实和App Inventor进行实验 · App Inventor 2 中文网
...型的 App Inventor 用户来说，它仍然不够简单。2016 年夏季编程项目的目标是研究将 Cardboard 功能集成到 App Inventor 中的方法。本文介绍了两个原型应用程序，一个显示沉浸式全景图，另一个添加了 3-D 建模。我们提供了可供下载和...
psql: FATAL: Peer authentication failed for user “dev”
...atabase user name
-h is the hostname/IP of the local server, thus avoiding Unix domain sockets
-d is the database name to connect to
This is then evaluated as a "network" connection by Postgresql rather than a Unix domain socket connection, thus not evaluated as a "local" connect as you might see ...
App Inventor 2 AI伴侣有电脑版的吗? - App Inventor 2 中文网 - 清泛网 - 专注C/C++及内核技术
...倒不如直接第二种方式）。
综上所述：
1、小朋友编程的话，有条件建议直接使用安卓手机扫二维码测试；否则使用最新版的AIStarter模拟器也可以。
2、对于没有安卓手机的或需要一屏展示效果的，建议第二种：使用商业...
App Inventor 2 连接方式：AI伴侣、模拟器、USB · App Inventor 2 中文网
...不如直接第二种方式）。
综上所述：
1、小朋友编程的话，有条件建议直接使用安卓手机扫二维码测试；否则使用最新版的AIStarter模拟器也可以。
2、对于没有安卓手机的或需要一屏展示效果的，建议第二种：使用商业...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
...
在编写此扩展之前，我从未进行过任何 Android 编程。我突然需要一款小型应用，这将是一次完美的学习体验。从小处着手，我遇到了 App Inventor 以及该平台的所有变体。经过一番研究，我得出结论，这将是一个不错的...
When should I use File.separator and when File.pathSeparator?
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You use separator when you are building a file path. So in unix the separator is /. So if you wanted to build the unix path /var/temp you would do it like this:
String path = File.separator + "var"+ File.separator + "temp"
You use the pathSeparator when you are dealing with a lis...