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Multiline syntax for piping a heredoc; is this portable?
...directions or pipes. Your example is similar to something like this:
cat file |
cmd
And the shell grammar (further down on the linked page) includes these definitions:
pipe_sequence : command
| pipe_sequence '|' linebreak command
newline_list ...
Can I draw rectangle in XML?
... android:color="#ffffffff" />
</shape>
You can create a new XML file inside the drawable folder, and add the above code, then save it as rectangle.xml.
To use it inside a layout you would set the android:background attribute to the new drawable shape. The shape we have defined does not h...
Git fetch remote branch
...ps in the accepted answer, I got the error that pathspec did not match any file(s) known to git., but the rbranch:lbranch approach worked. Interestingly, it also fetched all the tags that started with the same prefix, like it is a wildcard (rbranch*).
– haridsv
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What is the difference between the GNU Makefile variable assignments =, ?=, := and +=?
...dy give a clear explanation of how variable assignment really works in Makefiles.
6 Answers
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Squash my last X commits together using Git
...ing an editor and then searching and replacing for a string in the "to-do" file. Using git merge --squash is also easier to use in a script. Essentially, the reasoning was that you don't need the "interactivity" of git rebase -i at all for this.
– Mark Longair
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What is `git diff --patience` for?
...This situation is very ugly, and can result in a totally
unusable conflict file in the situation where you need such things to be
presented coherently the most.
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Return empty cell from formula in Excel
...uate to trueblank, if you type 0 in A2.
You can download a demonstration file here.
In the example above, evaluating formula to trueblank results in an empty cell. Checking result with ISBLANK formula results positively in TRUE. This is hara-kiri like formula. The formula disappears from cell whe...
Bash script processing limited number of commands in parallel
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For example, if you have the list of links in a file, you can do cat list_of_links.txt | parallel -j 4 wget {} which will keep four wgets running at a time.
– Mr. Llama
Aug 13 '15 at 19:30
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Install specific git commit with pip
...sible to automatically install a python package using the requirements.txt file on you project just by adding the following line:
-e git+https://github.com/owner/repository.git@branch_or_commit
and run the command line:
$ pip install -r requirements.txt
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Process escape sequences in a string in Python
Sometimes when I get input from a file or the user, I get a string with escape sequences in it. I would like to process the escape sequences in the same way that Python processes escape sequences in string literals .
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