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Cosine Similarity between 2 Number Lists
...sed on numpy only
from numpy import dot
from numpy.linalg import norm
cos_sim = dot(a, b)/(norm(a)*norm(b))
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Calculate distance between 2 GPS coordinates
...y solution:
#include <math.h>
#include "haversine.h"
#define d2r (M_PI / 180.0)
//calculate haversine distance for linear distance
double haversine_km(double lat1, double long1, double lat2, double long2)
{
double dlong = (long2 - long1) * d2r;
double dlat = (lat2 - lat1) * d2r;
...
Get hours difference between two dates in Moment Js
...ent('2016-06-06T22:34:56'); var b = moment('2016-06-06T21:03:55'); var diff_s = a.diff(b, 'seconds'); console.log(moment.utc(moment.duration(diff_s, "seconds").asMilliseconds()).format("hh:mm:ss"))
– user632905
Jul 12 at 15:35
...
Can anyone explain python's relative imports?
...from package "sub". start.py is not itself in a package even if there is a __init__.py present.
You would need to start your program from one directory over parent.py:
./start.py
./pkg/__init__.py
./pkg/parent.py
./pkg/sub/__init__.py
./pkg/sub/relative.py
With start.py:
import pkg.sub.relativ...
Will the base class constructor be automatically called?
...ered Oct 31 '12 at 19:21
Science_FictionScience_Fiction
3,2131414 silver badges2424 bronze badges
...
Converting integer to string in Python
... string is done with the builtin str() function, which basically calls the __str__() method of its parameter.
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In Flux architecture, how do you manage Store lifecycle?
...cher. Moving from one pseudo-page to another would probably involve a PAGE_UPDATE action, which would trigger the invocation of initialize(). There are details to work out around retrieving data from the local cache, retrieving data from the server, optimistic rendering and XHR error states, but t...
mongodb count num of distinct values per field/key
...}
},
{ $unwind: "$keywords" },
{
$group: {
_id: {$toLower: '$keywords'},
count: { $sum: 1 }
}
},
{
$match: {
count: { $gte: 2 }
}
},
{ $sort : { count : -1} },
{ $limit : 100 }
]);
that give result ...
Wolfram's Rule 34 in XKCD [closed]
... There was also the XKCD strip that listed number of hits for "killed in a __________ accident" (for various activities), and noted something like two hits for "blogging". That number went up very fast after the strip came out.
– David Thornley
Dec 18 '09 at 2...
Real world example about how to use property feature in python?
...changing terms.
Complex calculation hidden behind an attribute:
class PDB_Calculator(object):
...
@property
def protein_folding_angle(self):
# number crunching, remote server calls, etc
# all results in an angle set in 'some_angle'
# It could also reference a ca...