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How do I compute derivative using Numpy?
...en Theano might be a good choice.
Here is an example using SymPy
In [1]: from sympy import *
In [2]: import numpy as np
In [3]: x = Symbol('x')
In [4]: y = x**2 + 1
In [5]: yprime = y.diff(x)
In [6]: yprime
Out[6]: 2⋅x
In [7]: f = lambdify(x, yprime, 'numpy')
In [8]: f(np.ones(5))
Out[8]: [ 2. ...
Having links relative to root?
... to Fruits List</a>
Edited in response to question, in comments, from OP:
So doing / will make it relative to www.example.com, is there a way to specify what the root is, e.g what if i want the root to be www.example.com/fruits in www.example.com/fruits/apples/apple.html?
Yes, prefac...
Base64 encoding and decoding in client-side Javascript
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in node 5+, use Buffer.from, as new Buffer(string) is deprecated. Buffer.from(jwt.split('.')[1], 'base64').toString()
– Ray Foss
Oct 9 '19 at 18:46
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How can I combine hashes in Perl?
...ashes, copy one hash (%hash1) to a new hash (%new_hash), then add the keys from the other hash (%hash2 to the new hash. Checking that the key already exists in %new_hash gives you a chance to decide what to do with the duplicates:
my %new_hash = %hash1; # make a copy; leave %hash1 alone
foreach my...
Implementing comparison operators via 'tuple' and 'tie', a good idea?
(Note: tuple and tie can be taken from Boost or C++11.)
When writing small structs with only two elements, I sometimes tend to choose a std::pair , as all important stuff is already done for that datatype, like operator< for strict-weak-ordering.
The downsides though are the pretty much us...
How can I have grep not print out 'No such file or directory' errors?
... to pass in -R or the path.
git grep pattern
That will show all matches from your current directory down.
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Difference between Mutable objects and Immutable objects [duplicate]
...ct's data) cannot change after construction. Examples of immutable objects from the JDK include String and Integer.
For example:(Point is mutable and string immutable)
Point myPoint = new Point( 0, 0 );
System.out.println( myPoint );
myPoint.setLocation( 1.0, 0.0 );
Syst...
How to get correct timestamp in C#
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What is the other way around? from timestamp to datetime
– DanielV
Jun 15 '17 at 17:55
2
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Android and XMPP: Currently available solutions [closed]
...smack for developing my xmpp client,I am facing a problem > When i come from 1st time login I start my chatting with user B and receiving messages from user B also that is fine.i switch off my wifi and switch on it again then programatically reconnecting my jabber server and again login my accoun...
AngularJS - How can I do a redirect with a full page load?
I want to do a redirect that does a full page reload so that the cookies from my web server are refreshed when the page loads. window.location = "/#/Next" and window.location.href = "/#/Next" don't work, they do an Angular route which does not hit the server.
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