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Efficient evaluation of a function at every cell of a NumPy array
...t numpy as np
def f(x):
return x * x + 3 * x - 2 if x > 0 else x * 5 + 8
f = np.vectorize(f) # or use a different name if you want to keep the original f
result_array = f(A) # if A is your Numpy array
It's probably better to specify an explicit output type directly when vectorizing:
f...
What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
...mative references, as applying. Hence the minimal ranges as set out in C99 5.2.4.2.1 Sizes of integer types <limits.h> are applicable.
In terms of long double, that's actually a floating point value rather than an integer. Similarly to the integral types, it's required to have at least as m...
What's the best way to inverse sort in scala?
...te.
– Didier Dupont
Oct 19 '11 at 8:53
And to sort on a secondary field, return a tuple: list.sortBy(x => (-x.size,...
How to access the first property of a Javascript object?
...
1445
var obj = { first: 'someVal' };
obj[Object.keys(obj)[0]]; //returns 'someVal'
Using this you c...
Where are iOS simulator screenshots stored?
I have saved some screenshots in the iPhone Simulator running iOS 5, but I can't find them.
14 Answers
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From an array of objects, extract value of a property as array
...
1524
Here is a shorter way of achieving it:
let result = objArray.map(a => a.foo);
OR
let re...
C/C++ Struct vs Class
...
151
In C++, structs and classes are pretty much the same; the only difference is that where access ...
How accurately should I store latitude and longitude?
... 0.01 1.11 km
3 0.001 111 m
4 0.0001 11.1 m
5 0.00001 1.11 m
6 0.000001 0.111 m
7 0.0000001 1.11 cm
8 0.00000001 1.11 mm
ref : https://en.wikipedia.org/wiki/Decimal_degrees#Precision
...
Formatting Phone Numbers in PHP
... app and need to be able to convert the sender's phone number from +11234567890 to 123-456-7890 so it can be compared to records in a MySQL database .
...