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How do I compute derivative using Numpy?
...prone to numerical error and, if you're in a multivariate situation, can take a while.
Symbolic differentiation is ideal if your problem is simple enough. Symbolic methods are getting quite robust these days. SymPy is an excellent project for this that integrates well with NumPy. Look at the autow...
Differences between Proxy and Decorator Pattern
...an object.
Proxies vary in the degree to which they are implemented like a decorator. A
protection proxy might be implemented exactly like a decorator. On the other
hand, a remote proxy will not contain a direct reference to its real subject but only
an indirect reference, such as "host I...
Objective-C: Reading a file line by line
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That's a great question. I think @Diederik has a good answer, although it's unfortunate that Cocoa doesn't have a mechanism for exactly what you want to do.
NSInputStream allows you to read chunks of N bytes (very similar to java.io.BufferedReader), but y...
Peak-finding algorithm for Python/SciPy
...inding zero-crossings of the first derivative or something, but it seems like a common-enough function to be included in standard libraries. Anyone know of one?
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How can I get Express to output nicely formatted HTML?
...pment because you'll want more efficiency with the 'ugly' in production. Make sure to set environment variable NODE_ENV=production when you're deploying in production. This can be done with an sh script you use in the 'script' field of package.json and executed to start.
Express 3 changed this beca...
How to add a progress bar to a shell script?
...ng in bash or any other shell in *NIX, while running a command that will take more than a few seconds, a progress bar is needed.
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C++ new int[0] — will it allocate memory?
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Faisal ValiFaisal Vali
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What exactly is nullptr?
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How is it a keyword and an instance of a type?
This isn't surprising. Both true and false are keywords and as literals they have a type ( bool ). nullptr is a pointer literal of type std::nullptr_t, and it's a prvalue (you cannot take ...
Split a string by a delimiter in python
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Aran-Fey
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answered Aug 13 '10 at 8:48
adamkadamk
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How do I resolve “Cannot find module” error using Node.js?
...ed to install it globally using npm install -g.
I usually install most packages locally so that they get checked in along with my project code.
Update (8/2019):
Nowadays you can use package-lock.json file, which is automatically generated when npm modifies your node_modules directory. Therefore y...