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What are the differences between numpy arrays and matrices? Which one should I use?
...at the expense of the other,
since np.asmatrix and np.asarray allow you to convert one to the other (as
long as the array is 2-dimensional).
There is a synopsis of the differences between NumPy arrays vs NumPy matrixes here.
...
List distinct values in a vector in R
...els( data$product_code )
If it's not a factor, but it should be, you can convert it to factor first by using the factor() function, e.g.
levels( factor( data$product_code ) )
Another option, as mentioned above, is the unique() function:
unique( data$product_code )
The main difference between...
jQuery posting JSON
...ype : 'POST',
...
if you pass an object as settings.data jQuery will convert it to query parameters and by default send with the data type application/x-www-form-urlencoded; charset=UTF-8, probably not what you want
sh...
float64 with pandas to_csv
...ad the CSV file as usual and you will get those integer figures back. Then convert those values to floating point, dividing by the same factor you multiplied before.
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Oracle: If Table Exists
I'm writing some migration scripts for an Oracle database, and was hoping Oracle had something similar to MySQL's IF EXISTS construct.
...
How do I get the parent directory in Python?
...directory so you can put it in a JSON string. It would be kind of silly to convert to a Pathlib object and back again for that.
If none of the above apply, use Pathlib.
What is Pathlib?
If you don't know what Pathlib is, the Pathlib module is a terrific module that makes working with files e...
Define all functions in one .R file, call them from another .R file. How, if possible?
... have to re-source it. If your functions are changing a lot since you are converting the code, put them all in one file and just source the whole thing every time. You could also have a separate smaller file that 1. sources the larger collection of functions and 2. Runs your test cases. In R ther...
How to flush output of print function?
...nt, must be given as keyword arguments.
All non-keyword arguments are converted to strings like str() does and written to the stream, separated by sep and followed by end. Both sep and end must be strings; they can also be None, which means to use the default values. If no objects are given, pr...
Programmatically open Maps app in iOS 6
... completionHandler:^(NSArray *placemarks, NSError *error) {
// Convert the CLPlacemark to an MKPlacemark
// Note: There's no error checking for a failed geocode
CLPlacemark *geocodedPlacemark = [placemarks objectAtIndex:0];
MKPlacemark *placemark = [[MKPlacemark a...
Unit testing void methods?
...ence not normally unit-tested. However if you must, You can verify if the handling to be done on a notification takes place. e.g.
void OnAccountDebit( dAmount ) // emails account holder with info
can be tested by verifying if the email is being sent
Post more details about your actual method an...