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Rails create or update magic?
...ils - you have to separate it into two Ruby statements, one for the object selection and one for the attribute update.
– sameers
Sep 23 '14 at 5:08
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How to link a folder with an existing Heroku app
... switch to the "deploy" tab and choose the deployment method "Heroku git" (selected by default). Then, you'll get instructions on how to connect an existing folder/git with Heroku.
– handy
Apr 13 at 8:30
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Undo git update-index --assume-unchanged
...will print all files with their status
grep '^[a-z]' will filter files and select only assume unchanged
cut -c 3- will remove status and leave only paths, cutting from the 3-rd character to the end
tr '\012' '\000' will replace end of line character (\012) to zero character (\000)
xargs -0 git updat...
How to kill all processes with a given partial name? [closed]
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If you need more flexibility in selecting the processes use
for KILLPID in `ps ax | grep 'my_pattern' | awk ' { print $1;}'`; do
kill -9 $KILLPID;
done
You can use grep -e etc.
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How to install the JDK on Ubuntu Linux
...8-installer . If you have multiple java installed on your system, you can select with : sudo update-alternatives --config java
– Guagua
Jun 13 '14 at 22:27
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Real world use cases of bitwise operators [closed]
...ut a second time will undo the first. Older GUIs used to rely on this for selection highlighting and other overlays, in order to eliminate the need for costly redraws. They're still useful in slow graphics protocols (i.e. remote desktop).
Those were just the first few examples I came up with - t...
How do I tidy up an HTML file's indentation in VI?
...her move the cursor to the top of the file and indent to the end: gg =G
Or select the desired text to indent and hit = to indent it.
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How can I see the size of a GitHub repository before cloning it?
...ip ever worked, but in any case, doing so now only downloads the currently selected branch with no history.
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How to execute a MySQL command from a shell script?
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mysql -h <host> -u<user> -p<password> database -e \
"SELECT * FROM blah WHERE foo='bar';"
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JavaScript post request like a form submit
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This would be a version of the selected answer using jQuery.
// Post to the provided URL with the specified parameters.
function post(path, parameters) {
var form = $('<form></form>');
form.attr("method", "post");
form.attr("actio...