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How to pipe input to a Bash while loop and preserve variables after loop ends
...hopt -s lastpipe # Comment this out to see the alternative behaviour
sum=0
echo "$FILECONTENT" |
while read number name; do ((sum+=$number)); done
echo $sum
Doing this at the command line usually runs foul of 'job control is not active' (that is, at the command line, job control is active). Test...
Pipe output and capture exit status in Bash
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530
There is an internal Bash variable called $PIPESTATUS; it’s an array that holds the exit statu...
Can I get the name of the current controller in the view?
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edited Feb 3 '17 at 11:04
mb21
25.4k55 gold badges8585 silver badges108108 bronze badges
answered Sep...
How can I sharpen an image in OpenCV?
...f frame into image: (both cv::Mat)
cv::GaussianBlur(frame, image, cv::Size(0, 0), 3);
cv::addWeighted(frame, 1.5, image, -0.5, 0, image);
The parameters there are something you need to adjust for yourself.
There's also Laplacian sharpening, you should find something on that when you google.
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Rename an environment with virtualenvwrapper
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210
You can use:
cpvirtualenv oldenv newenv
rmvirtualenv oldenv
So in your case:
cpvirtualenv do...
css rotate a pseudo :after or :before content:“”
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370
Inline elements can't be transformed, and pseudo elements are inline by default, so you must app...
What is the difference between user and kernel modes in operating systems?
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edited Mar 24 '14 at 0:07
Chris Simmons
6,01855 gold badges2828 silver badges4545 bronze badges
ans...
document.getElementById vs jQuery $()
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1035
Not exactly!!
document.getElementById('contents'); //returns a HTML DOM Object
var contents ...
Show all Elasticsearch aggregation results/buckets and not just 10
... all buckets on an aggregation, but it seems to be showing only the first 10.
4 Answers
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Reading a binary file with python
...ython. Can you give me a hand?
I need to read this file, which in Fortran 90 is easily read by
6 Answers
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