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How to calculate a logistic sigmoid function in Python?
...
def sigmoid(x):
return 1 / (1 + math.exp(-x))
And now you can test it by calling:
>>> sigmoid(0.458)
0.61253961344091512
Update: Note that the above was mainly intended as a straight one-to-one translation of the given expression into Python code. It is not tested or known to be a n...
SQL, Postgres OIDs, What are they and why are they useful?
... two, you could do that using the oid column.
OIDs are implemented using 4-byte unsigned integers. They are not unique–OID counter will wrap around at 2³²-1. OID are also used to identify data types (see /usr/include/postgresql/server/catalog/pg_type_d.h).
In my experience, the feature is genera...
Memcache(d) vs. Varnish for speeding up 3 tier web architecture
...the database only has to write this comment. Nothing else needs to be done by the database to generate the page. All the comments are pulled by Memcache, and the page is recached until somebody affects it again (perhaps by voting my answer up). Again, the database writes the vote, all other data is ...
An error occurred while validating. HRESULT = '8000000A'
...om Visual Studio Setup projects (.vdproj).
We've worked around this issue by triggering the MSI build a second time when it fails a first time. Not nice, but it works most of the time (error rate is down from ~ 10% to ~ 1%).
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What ports does RabbitMQ use?
...h other and the port mapper daemon for clustering to work.
PORT 35197
set by inet_dist_listen_min/max Firewalls must permit traffic in this range to pass between clustered nodes
RabbitMQ Management console:
PORT 15672 for RabbitMQ version 3.x
PORT 55672 for RabbitMQ pre 3.x
PORT 5672 RabbitMQ ...
Are members of a C++ struct initialized to 0 by default?
... x{0}; //with braces int y = 0 ; //or just old school style 'by assignement' which is really initialization too };
– ikku100
May 5 '16 at 17:36
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Using port number in Windows host file
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What you want can be achieved by modifying the hosts file through Fiddler 2 application.
Follow these steps:
Install Fiddler2
Navigate to Fiddler2 menu:- Tools > HOSTS.. (Click to select)
Add a line like this:-
localhost:8080 www.mydomainnam...
Choosing Java vs Python on Google App Engine
...a seems to have a longer list of libraries and especially support for Java bytecode regardless of the languages used to write that code. Which language will give better performance and more power? Please advise. Thank you!
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Pointer to pointer clarification
... also used in statements to access the contents of the variable pointed at by a pointer (dereferencing operator).
– Lucas A.
Feb 11 '14 at 20:33
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Can anyone explain what JSONP is, in layman terms? [duplicate]
... security risks.
JSONP (JSON with Padding) is a method commonly used to
bypass the cross-domain policies in web browsers. (You are not allowed to make AJAX requests to a web page perceived to be on a different server by the browser.)
JSON and JSONP behave differently on the client and the server...