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how perform grep operation on all files in a directory
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grep $PATTERN * would be sufficient. By default, grep would skip all subdirectories. However, if you want to grep through them, grep -r $PATTERN * is the case.
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Exiting from python Command Line
...e exit in the command line, it finds the variable with that name and calls __repr__ (or __str__) on it. Usually, you'd get a result like:
<function exit at 0x00B97FB0>
But they decided to redefine that function for the exit object to display a helpful message instead. Whether or not that's ...
JavaScript % (modulo) gives a negative result for negative numbers
...10) instead of -13 % 10. It would be more clear.
– Jp_
Dec 1 '16 at 10:58
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Setting environment variables via launchd.conf no longer works in OS X Yosemite/El Capitan/macOS Sie
...iables will not be set (so you'll need to set them in ~/.bash_profile). Finally, this doesn't seem to work for PATH on El Capitan and Sierra. That needs to be set via 'launchctl config user path ...' and in /etc/paths.
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Associativity of “in” in Python?
I'm making a Python parser, and this is really confusing me:
4 Answers
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Do you need text/javascript specified in your tags?
...tribute is optional. Since Netscape 2, the default programming language in all browsers has been JavaScript. In XHTML, this attribute is required and unnecessary. In HTML, it is better to leave it out. The browser knows what to do.
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How to create file execute mode permissions in Git on Windows?
... would be nice if git-add had a --mode flag
git 2.9.x/2.10 (Q3 2016) actually will allow that (thanks to Edward Thomson):
git add --chmod=+x -- afile
git commit -m"Executable!"
That makes the all process quicker, and works even if core.filemode is set to false.
See commit 4e55ed3 (31 May 2016)...
Django FileField with upload_to determined at runtime
...eed to use the filename given - you could override that in your upload_to callable too if you liked.
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Python AttributeError: 'module' object has no attribute 'Serial' [duplicate]
...he class. So, you must write:
from serial import Serial
You need to install serial module correctly: pip install pyserial.
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Android: Getting a file URI from a content URI?
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Actually, I just re-read the docs for getContentResolver().openInputStream(), and it works automatically for schemes of "content" or "file", so you don't need to check the scheme... if you can safely assume that it's always going...