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Suppress command line output
...2>&1
and all will be better.
That works because stdout is file descriptor 1, and stderr is file descriptor 2 by convention. (0 is stdin, incidentally.) The 2>&1 copies output file descriptor 2 from the new value of 1, which was just redirected to the null device.
This syntax is (lo...
How to open every file in a folder?
I have a python script parse.py, which in the script open a file, say file1, and then do something maybe print out the total number of characters.
...
jQuery get the image src
...onsole.log('for relative image url ' + $('#imageId').attr('src'));
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<img id='imageId' src='images/image1.jpg' height='50px' width='50px'/>
<input type='button' onclick='showImgUrl()' ...
Actual meaning of 'shell=True' in subprocess
...ll are nontrivial, you now require the reader and maintainer of the Python script (which may or may not be your future self) to understand both Python and shell script. Remember the Python motto "explicit is better than implicit"; even when the Python code is going to be somewhat more complex than t...
Convert an image to grayscale in HTML/CSS
...
Update: I made this into a full GitHub repo, including JavaScript polyfill for IE10 and IE11: https://github.com/karlhorky/gray
I originally used SalmanPK's answer, but then created the variation below to eliminate the extra HTTP request required for the SVG file. The inline SVG wor...
How to turn on line numbers in IDLE?
...top (Win10) like this:
C:\Python\Python37\pythonw.exe "C:\Python\Python37\Scripts\idlex.pyw"
The paths may be different and need to be changed:
C:\Python\Python37
(Thanks for the great answers above)
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List all svn:externals recursively?
...
I used the answer of Wim Coenen and wrote the following script to create a list of all revisions:
getSvnRevs() {
cd "$1"
wcver="$(svnversion)"
[ -n "$wcver" ] || panic "Unable to get version for $wcdir"
echo "$1: $wcver"
svn propget svn:externals -R | while read a b c d...
JavaScript - onClick to get the ID of the clicked button
...tton id="3" onClick="reply_click(this.id)">B3</button>
<script type="text/javascript">
function reply_click(clicked_id)
{
alert(clicked_id);
}
</script>
This will send the ID this.id as clicked_id which you can use in your function. See it in actio...
Best content type to serve JSONP?
...
Use application/javascript. In that way, clients can rely on the content-type without having to manually check whether a response has padding or not.
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Git: Show all of the various changes to a single line in a specified file over the entire git histor
...og -G "var identifier =" file.js
EDIT: Here's a rough start for a bash script to show the actual lines. This might be more what you're looking for.
for c in $(git log -G "something" --format=%H -- file.js); do
git --no-pager grep -e "something" $c -- file.js
done
It uses git log -G to fi...