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GroupBy pandas DataFrame and select most common value
...does not have a 'Short name' attribute.
stats.mode returns a tuple of two arrays, so you have to take the first element of the first array in this tuple.
With these two simple changements:
source.groupby(['Country','City']).agg(lambda x: stats.mode(x)[0][0])
returns
Sh...
What is the difference between ? and Object in Java generics?
... in fact a subtype of Object[], that's one of the reasons why generics and arrays don't mix well. (arrays in Java are covariant, generics are not, they are invariant)).
Sample:
If you'd like to write a method that accepts Lists of InputStreams and subtypes of InputStream, you'd write
public void f...
In Go's http package, how do I get the query string on a POST request?
...
I found it interesting req.Form is empty array unless req.formValue("some_field") is invoked at lease once.
– Qian Chen
Jun 21 '15 at 14:51
...
What is the most pythonic way to check if an object is a number?
...n should cover all normal and sane code that you generate/encouter.
numpy.array example:
import numpy as np
def isNumber(x):
try:
return bool(x*0 == 0)
except:
return False
x = np.array([0,1])
answer = isNumber(x)
print('{answer} == isNumber({x})'.format(**locals()))
o...
Literal notation for Dictionary in C#?
...ogrammed in C#. In JavaScript, I can pass data easily using an associative array:
4 Answers
...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...
2 c 3
3 d 4
4 e 5
Try:
# Get the values out to a 2-D numpy array,
df.values
[out]:
array([['a', 1],
['b', 2],
['c', 3],
['d', 4],
['e', 5]], dtype=object)
Then optionally:
# Dump it into a list so that you can sort it using `sorted()`
sorted(df.val...
Can enums be subclassed to add new elements?
...ace is used by the Java 1.7 API, e.g. java.nio.file.Files.write() takes an array of OpenOption as the last argument. OpenOption is an interface, but when we call this function we usually pass a StandardOpenOption enum constant, which is derived from OpenOption. This has the advantage of being extens...
How do I resize a Google Map with JavaScript after it has loaded?
... google.maps.event.trigger(map, 'resize');
});
map_array[Next].setZoom( map.getZoom() - 1 );
map_array[Next].setZoom( map.getZoom() + 1 );
share
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improve this answer
...
What is the best algorithm for overriding GetHashCode?
...d. from: www.partow.net
/// </summary>
/// <param name="input">array of objects, parameters combination that you need
/// to get a unique hash code for them</param>
/// <returns>Hash code</returns>
public static int RSHash(params object[] input)
{
const int b = 3785...
How to get first N elements of a list in C#?
...ist with n elements in it (assuming that that many are available). Use .ToArray() or .ToList() on the result of the Take to get a concrete array or list.
– Andrew Webb
May 22 at 7:56
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