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How to convert timestamps to dates in Bash?
... a date. The input can come either from the first parameter or from stdin, allowing for the following usage patterns:
15 An...
Running multiple commands with xargs
...t in some cases, I need multiple commands to process the argument instead of one. For example:
11 Answers
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Mapping over values in a python dictionary
..., f(kv[1])), my_dictionary.iteritems()))
but that's not that readable, really.
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Best way to do multi-row insert in Oracle?
...AG_NAME,PAG_ACTIVE)
select 8000,0,'Multi 8000',1 from dual
union all select 8001,0,'Multi 8001',1 from dual
The thing to remember here is to use the from dual statement.
(source)
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Delete empty lines using sed
... spaces or tabs in your "empty" line. Use POSIX classes with sed to remove all lines containing only whitespace:
sed '/^[[:space:]]*$/d'
A shorter version that uses ERE, for example with gnu sed:
sed -r '/^\s*$/d'
(Note that sed does NOT support PCRE.)
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List directory tree structure in python?
I know that we can use os.walk() to list all sub-directories or all files in a directory. However, I would like to list the full directory tree content:
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App Inventor 2 中文网
您的浏览器可能不兼容！ 要使用 Android 版 App Inventor 2，您必须使用兼容的浏览器。 目前支持的浏览器有： Google Chrome 29+ Safari 6.1+ Firefox 23+ 关于App Inventor 2 ...
Using property() on classmethods
... (using the classmethod() function) for getting and setting what is essentially a static variable. I tried to use the property() function with these, but it results in an error. I was able to reproduce the error with the following in the interpreter:
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LEGO EV3 机器人传感器面板 · App Inventor 2 中文网
...建 Apps 首页 教育 中文教育版 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 ...