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How to concatenate multiple lines of output to one line?
If I run the command cat file | grep pattern , I get many lines of output. How do you concatenate all lines into one line, effectively replacing each "\n" with "\" " (end with " followed by space)?
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Ruby on Rails: How do I add a not null constraint to an existing column using a migration?
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I had to change it for a bunch of columns and this doesn't require specifying the column type for each column, much better!
– Dorian
Jan 8 '15 at 12:19
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How to trigger the window resize event in JavaScript?
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This doesn't work in Internet Explorer, where you'll have to do the longhand:
var resizeEvent = window.document.createEvent('UIEvents');
resizeEvent.initUIEvent('resize', true, false, window, 0);
window.dispatchEvent(resizeEvent);
jQuery has the trigger method, which works like this:
$(window)....
Check if current directory is a Git repository
...use it in a script.
Condensed into a one line condition suitable for bash and zsh
[ -d .git ] && echo .git || git rev-parse --git-dir > /dev/null 2>&1
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Get user profile picture by Id
...about users - actually , the possible public data available - such as name and id.
I also know that a profile picture is a part of the public data, and I wondered how I'll be able to get a direct link to a profile picture of a user only by using his id?
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Multiple commands in an alias for bash
I'd like to define an alias that runs the following two commands consecutively.
9 Answers
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Trust Store vs Key Store - creating with keytool
I understand that the keystore would usually hold private/public keys and the trust store only public keys (and represents the list of trusted parties you intend to communicate with). Well, that's my first assumption, so if that's not correct, I probably haven't started very well...
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How to set proxy for wget?
...>=127.0.0.01:8080 <download>..., omitting the "use_proxy=yes" command parameter. Thanks!
– alejandrob
Sep 25 '15 at 15:45
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How to remove debugging from an Express app?
...e to remove the debugging mode. I am using express , redis , socket.io and connect-redis , but I do not know where the debugging mode comes from.
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How do I remove/delete a virtualenv?
I created an environment with the following command: virtualenv venv --distribute
16 Answers
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