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What are these ^M's that keep showing up in my files in emacs?
...acters correctly.
I assume it's the Windows folk as they love their CRLF. Unix loves LF and Mac loved CR until it was shown the Unix way.
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What is the difference between \r and \n?
How are \r and \n different? I think it has something to do with Unix vs. Windows vs. Mac, but I'm not sure exactly how they're different, and which to search for/match in regexes.
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Get operating system info
...1}', 'Solaris');
$ros[] = array('dos x86', 'DOS');
$ros[] = array('unix', 'Unix');
$ros[] = array('Mac OS X', 'Mac OS X');
$ros[] = array('Mac_PowerPC', 'Macintosh PowerPC');
$ros[] = array('(mac|Macintosh)', 'Mac OS');
$ros[] = array('(sunos)([0-9]{1,2}\.[0-9]{1,2}){0,1}', '...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
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在编写此扩展之前，我从未进行过任何 Android 编程。我突然需要一款小型应用，这将是一次完美的学习体验。从小处着手，我遇到了 App Inventor 以及该平台的所有变体。经过一番研究，我得出结论，这将是一个不错的...
What specifically are wall-clock-time, user-cpu-time, and system-cpu-time in UNIX?
...at specifically are wall-clock-time, user-cpu-time, and system-cpu-time in UNIX?
4 Answers
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Unix shell script find out which directory the script file resides?
... don't add anything useful). The interesting work is done by the mentioned unix command readlink with option -f. Works when the script is called by an absolute as well as by a relative path.
For bash, sh, ksh:
#!/bin/bash
# Absolute path to this script, e.g. /home/user/bin/foo.sh
SCRIPT=$(readlin...
游戏中的算法与计算思维：从知识到实战，八课附 .aia · App Inventor 2 中文网
...功和失败操作记录；展示一次独立完成的修改。
先修：编程基础的变量、条件、过程与计时器。没有硬件、账号或收费素材依赖。
您的改进建议 联系方式： 不需要回复的可留空~ ...
In Unix, how do you remove everything in the current directory and below it?
...and why.
First, if you look at the rm command man page (man rm under most Unix) you notice that –r means "remove the contents of directories recursively". So, doing rm -r . alone would delete everything in the current directory and everything bellow it.
In rm –rf . the added -f means "ignore ...
What's an easy way to read random line from a file in Unix command line?
What's an easy way to read random line from a file in Unix command line?
13 Answers
13...
数据结构与本地数据库：从知识到实战，八课附 .aia · App Inventor 2 中文网
...功和失败操作记录；展示一次独立完成的修改。
先修：编程基础的变量、条件、过程与保存。第六课开始使用本平台内置 SQLite；无需准备服务器或硬件。
您的改进建议 联系方式： 不...