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What is “entropy and information gain”?
...that best splits the target class into the purest possible children nodes (ie: nodes that don't contain a mix of both male and female, rather pure nodes with only one class).
This measure of purity is called the information. It represents the expected amount of information that would be needed to s...
CORS Access-Control-Allow-Headers wildcard being ignored?
...-Style-Type, Content-Transfer-Encoding, Content-Type, Content-Version, Cookie, Cost, DAV, DELETE, DNT, DPR, Date, Default-Style, Delta-Base, Depth, Derived-From, Destination, Differential-ID, Digest, ETag, Expect, Expires, Ext, From, GET, GetProfile, HEAD, HTTP-date, Host, IM, If, If-Match, If-Modif...
What Git branching models work for you?
...ou want
From that, you can respect a few rules to make your questions easier:
only rebase a branch if it hasn't been pushed (not pushed since the last rebase)
only push to a bare repo (mandatory since Git1.7)
follow Linus's advices on rebase and merges
Now:
Workflows / branching models:
eac...
What is polymorphism, what is it for, and how is it used?
...m right corners and (possibly) a rotation. An irregular polygon needs a series of lines.
By making the class responsible for its code as well as its data, you can achieve polymorphism. In this example, every class would have its own Draw() function and the client code could simply do:
shape.Draw()...
Caveats of select/poll vs. epoll reactors in Twisted
Everything I've read and experienced ( Tornado based apps ) leads me to believe that ePoll is a natural replacement for Select and Poll based networking, especially with Twisted. Which makes me paranoid, its pretty rare for a better technique or methodology not to come with a price.
...
Are HLists nothing more than a convoluted way of writing tuples?
...dentify canonical use cases where HLists cannot be used (or rather, don't yield any benefits over regular lists).
4 Answers...
Why are floating point numbers inaccurate?
...programming languages, floating point numbers are represented a lot like scientific notation: with an exponent and a mantissa (also called the significand). A very simple number, say 9.2, is actually this fraction:
5179139571476070 * 2 -49
Where the exponent is -49 and the mantissa is 51791395...
Difference between shared objects (.so), static libraries (.a), and DLL's (.so)?
I have been involved in some debate with respect to libraries in Linux, and would like to confirm some things.
4 Answers
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multi-layer perceptron (MLP) architecture: criteria for choosing number of hidden layers and size of
...nodes in the hidden layer?
From the MLP academic literature. my own experience, etc., I have gathered and often rely upon several rules of thumb (RoT), and which I have also found to be reliable guides (ie., the guidance was accurate, and even when it wasn't, it was usually clear what to do next):...
Javascript object Vs JSON
...sents an object differently under-the-hood. However, because we've stringified the object into JSON notation; i.e. a standardised way to represent data, we can transmit the JSON representation of the object to another langauge (C++, PHP), they can recreate the JavaScript object we had into their own...