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Does git return specific return error codes?
... are
lost.
The first way is when a command is in the upstream of a pipe. In a
pipe, only the return code of the last command is used. Thus, all other
commands will have their return codes masked.
Rewrite pipes so that there are no Git commands upstream.
The other way is when a com...
How to use find command to find all files with extensions from list?
...not work for me on mac, but works with the -E (extended) option (maybe the pipe is an extended feature?): find -E /path/to -iregex ".*\.(jpg|gif|png|jpeg)" > log
– ling
Oct 21 '15 at 7:38
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How to count lines in a document?
... < <filename>:
$ wc -l < /dir/file.txt
3272485
You can also pipe data to wc as well:
$ cat /dir/file.txt | wc -l
3272485
$ curl yahoo.com --silent | wc -l
63
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Count number of rows within each group
I have a dataframe and I would like to count the number of rows within each group. I reguarly use the aggregate function to sum data as follows:
...
CMake使用教程 - C/C++ - 清泛网 - 专注C/C++及内核技术
...例详细介绍了使用过程，Step1的配置可能不够完全，比如无法运行make install，无法运行make test，但可以参考。）
简单的程序编译。
（1）运行GUI的cmake，指定要编译的源代码路径和二进制文件路径（会自动创建）。
（2）点击C...
Set the value of a variable with the result of a command in a Windows batch file
...
Note that if your command includes a pipe then you need to escape it with a caret, for example: for /f "delims=" %%a in ('echo foobar^|sed -e s/foo/fu/') do @set foobar=%%a
– yoyo
Apr 21 '15 at 22:42
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HTTP POST and GET using cURL in Linux [duplicate]
... @emoleumassi see x-yuri's comment before yours; you should be able to pipe the return into another command, such as less.
– AVProgrammer
Jul 21 '16 at 14:25
1
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从Code Review 谈如何做技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...讨论的过程中，居然发现有个“因为对方用户的设置”我无法回复了（我被拉黑了，还有一些直接就是冷讽和骂人了，微博中我就直接删除了）。这些批评我的阿里工程师/架构师的观点总结一下如下：（顺便说一下，阿里内还...
How to See the Contents of Windows library (*.lib)
.../SYMBOLS and /EXPORTS don't work nowadays. I have to use /ALL with a |more pipe to see all functions in the .lib file.
– user5280911
Jun 21 '18 at 10:44
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Printing the last column of a line in a file
... means wait for more input, but there are no more lines in file and so the pipe to grep is never closed.
If you omit -f from tail the output is shown immediately:
tail file | grep A1 | awk '{print $NF}'
@EdMorton is right of course. Awk can search for A1 as well, which shortens the command lin...