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Check if a table exists in Rails
...ecord::Base.connection.data_source_exists? 'table_name' is the correct one now
– Dorian
Dec 30 '16 at 1:35
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Gesture recognizer and button actions
...n the right direction. Although this solves my problem, but i still don't know why the responder hierarchy is not working in this case. It probably should, but it's not being handled by Apple.
– Mustafa
Jan 28 '11 at 7:29
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How to export table as CSV with headings on Postgresql?
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For v9.5, the command is now COPY products_273 TO '/tmp/products_199.csv' WITH (FORMAT CSV, HEADER);
– Shubham Goyal
Apr 20 '16 at 10:02
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How to get the list of files in a directory in a shell script?
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@SorenBjornstad thanks for the advice! I didn't know newlines were permitted in filenames- what kind of files might have them? Like, is this something that occurs commonly?
– rrr
Sep 4 '18 at 2:28
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Django: Get an object form the DB, or 'None' if nothing matches
... = models.CharField(max_length=255)
objects = GetOrNoneManager()
And now I can do this:
bob_or_none = Person.objects.get_or_none(name='Bob')
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Adding a guideline to the editor in Visual Studio
... for a light grey: RGB(221, 221, 221).
Here are the registry keys that I know of:
Visual Studio 2010: HKCU\Software\Microsoft\VisualStudio\10.0\Text Editor
Visual Studio 2008: HKCU\Software\Microsoft\VisualStudio\9.0\Text Editor
Visual Studio 2005: HKCU\Software\Microsoft\VisualStudio\8.0\Text E...
Get a specific bit from byte
...t;< (4-1) == 8 (2^3)
00000001 << (4-1) == 00001000
Now you know how it's done, what's going on at the low level, and why it works.
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matplotlib colorbar for scatter
...t needs to be a list of floats rather than a list of tuples as you have it now.
plt.colorbar() wants a mappable object, like the CircleCollection that plt.scatter() returns.
vmin and vmax can then control the limits of your colorbar. Things outside vmin/vmax get the colors of the endpoints.
How do...
POST unchecked HTML checkboxes
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Now that I re-read the question it seems this wasn't really what you wanted. However I got to this question when I was trying to figure out this answer so maybe it could be useful to someone else.
– Sam...
Node.js EACCES error when listening on most ports
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You just saved me hours of debug. I didn't know about that.
– Malharhak
Jan 23 '13 at 3:03
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