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Postgres dump of only parts of tables for a dev snapshot
... mytable WHERE ...) TO '/tmp/myfile.tsv'
COPY mytable FROM 'myfile.tsv'
https://www.postgresql.org/docs/current/static/sql-copy.html
You should consider maintaining a set of development data rather than just pulling a subset of your production. In the case that you're writing unit tests, you co...
How can I check whether a numpy array is empty or not?
...
http://www.scipy.org/Tentative_NumPy_Tutorial#head-6a1bc005bd80e1b19f812e1e64e0d25d50f99fe2
NumPy's main object is the homogeneous multidimensional array. In Numpy dimensions are called axes. The number of axes is rank. N...
Why doesn't Java offer operator overloading?
...++ Matrix object":
// C++ YMatrix matrix implementation on CodeProject
// http://www.codeproject.com/KB/architecture/ymatrix.aspx
// A, B, C, D, E, F are Matrix objects;
E = A * (B / 2) ;
E += (A - B) * (C + D) ;
F = E ; // deep copy of the matrix
// Java JAMA matrix implementat...
How to programmatically send SMS on the iPhone?
...oes exactly what you are looking for: the MFMessageComposeViewController.
http://blog.mugunthkumar.com/coding/iphone-tutorial-how-to-send-in-app-sms/
Essentially:
MFMessageComposeViewController *controller = [[[MFMessageComposeViewController alloc] init] autorelease];
if([MFMessageComposeViewCont...
Write to UTF-8 file in Python
...
Read the following: http://docs.python.org/library/codecs.html#module-encodings.utf_8_sig
Do this
with codecs.open("test_output", "w", "utf-8-sig") as temp:
temp.write("hi mom\n")
temp.write(u"This has ♭")
The resulting file is UT...
How to modify PATH for Homebrew?
... your error.
This blog post helped me out in resolving issues I ran into. http://moncefbelyamani.com/how-to-install-xcode-homebrew-git-rvm-ruby-on-mac/
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Why did Rails4 drop support for “assets” group in the Gemfile
...piled and will be
served as static assets by your web server.
(Source: http://edgeguides.rubyonrails.org/asset_pipeline.html#in-production)
But many time you have to use these 'assets' gems in production... for example, if you use a js.coffee file in your views directory, then Rails needs coffe...
Can the :not() pseudo-class have multiple arguments?
...:
input:not([type="radio"]):not([type="checkbox"]) {
/* css here */
}
http://cssnext.io/features/#not-pseudo-class
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Why isn't sizeof for a struct equal to the sum of sizeof of each member?
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See also:
for Microsoft Visual C:
http://msdn.microsoft.com/en-us/library/2e70t5y1%28v=vs.80%29.aspx
and GCC claim compatibility with Microsoft's compiler.:
http://gcc.gnu.org/onlinedocs/gcc/Structure_002dPacking-Pragmas.html
In addition to the previous an...
Size of character ('a') in C/C++
...fic difference between C and C++ in something I wrote a few years ago, at: http://david.tribble.com/text/cdiffs.htm
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