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Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
...0'::timestamp::date;
date
------------
2010-01-01
On the other hand you can use date_trunc function. The difference between them is that the latter returns the same data type like timestamptz keeping your time zone intact (if you need it).
=> select date_trunc('day', now());
da...
Cast an instance of a class to a @protocol in Objective-C
... edited Mar 21 '17 at 21:08
Alexander Abakumov
9,59199 gold badges6363 silver badges9999 bronze badges
answered Nov 26 '10 at 1:47
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Remove 'a' from legend when using aesthetics and geom_text
... this was not that obvious. A proper example would have used the OP's code and just added the missing argument like this:
..
geom_text(aes(label=Species), show_guide = F) +
..
share
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improve this...
What is the IntelliJ shortcut to create a local variable?
... This is the Introduce Variable refactoring. By default, select some text, and then hit Ctrl + Alt + V (for Mac: ⌘+⌥+V). If the expression is incomplete or invalid, IntelliJ will still make a good guess about what you meant and try to fix it for you.
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Ruby on Rails generates model field:type - what are the options for field:type?
I'm trying to generate a new model and forget the syntax for referencing another model's ID. I'd look it up myself, but I haven't figured out, among all my Ruby on Rails documentation links, how to find the definitive source.
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Server polling with AngularJS
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Assuming the above code is for pageA and controllerA. How do i stop this timer when I navigate to pageB and controllerB ?
– Varun Verma
Nov 21 '13 at 10:46
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Preserve colouring after piping grep to grep
... You can override this behavior with grep --color=always
The correct command line would be
grep --color=always WORD * | grep -v AVOID
This is pretty verbose, alternatively you can just add the line
alias cgrep="grep --color=always"
to your .bashrc for example and use cgrep as the colored gr...
How to close off a Git Branch?
...'ve made a recent change to our procedure. Using git push --tags is heavy handed and downloads all tags. This makes it difficult to have you're own local tags. Instead we use git push origin branch-<feature-branch> to push just the one tag.
– Bill Door
Ap...
MySQL: How to copy rows, but change a few fields?
... do it without having to specify the column names?
– Andrew
May 6 '10 at 18:00
4
Not that I'm awa...
Check difference in seconds between two times
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Assuming dateTime1 and dateTime2 are DateTime values:
var diffInSeconds = (dateTime1 - dateTime2).TotalSeconds;
In your case, you 'd use DateTime.Now as one of the values and the time in the list as the other. Be careful of the order, as the...