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How to drop multiple columns in postgresql
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You can even leave out 'COLUMN' and use ALTER TABLE table DROP col1, DROP col2;
– Ondrej Burkert
Sep 11 '15 at 10:45
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How to get the full url in Express?
...sume to be http unless you see that req.get('X-Forwarded-Protocol') is set and has the value https, in which case you know that's your protocol
The host comes from req.get('host') as Gopal has indicated
Hopefully you don't need a non-standard port in your URLs, but if you did need to know it you'd ...
rsync: how can I configure it to create target directory on server?
... rsync from local computer to server. On a directory that does not exist, and I want rsync to create that directory on the server first.
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How to sort a list of strings numerically?
... This works if the list element is stored as "integer", how shall be handled in case of float values? Eg., list1 = [1, 1.10, 1.11, 1.1, 1.2]
– sathish
May 19 '16 at 9:01
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Stop/Close webcam which is opened by navigator.getUserMedia
...er will have to access the tracks that make up the stream (audio or video) and stop each of them individually.
More info here: https://developers.google.com/web/updates/2015/07/mediastream-deprecations?hl=en#stop-ended-and-active
Example (from the link above):
stream.getTracks().forEach(funct...
How to make a vertical line in HTML
...a <div> around the markup where you want the line to appear to next, and use CSS to style it:
.verticalLine {
border-left: thick solid #ff0000;
}
<div class="verticalLine">
some other content
</div>
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Number of processors/cores in command line
I am running the following command to get the number of processors/cores in Linux:
10 Answers
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What does the -ObjC linker flag do?
I have an app that works with and without the linker flag. However, without the linker flag, I get a very different behaviour when adding data to a view.
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Transmitting newline character “\n”
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%0A for newline \n <LF>` ; and %0D for carriage return \r <CR>
– sergiol
Oct 11 '17 at 16:55
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Behaviour of final static method
I have been playing around with modifiers with static method and came across a weird behaviour.
7 Answers
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