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How is this fibonacci-function memoized?
...In normal doubly-recursve Fibonacci definition, fib n = fib (n-1) + fib (n-2), the function itself gets called, twice from the top, causing the exponential explosion. But with that trick, we set out a list for the interim results, and go "through the list":
fib n = (xs!!(n-1)) + (xs!!(n-2)) where x...
MySQL Database won't start in XAMPP Manager-osx
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In Python, when should I use a function instead of a method?
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edited Jul 17 '17 at 2:32
charlie80
47133 silver badges1515 bronze badges
answered Nov 13 '11 at 1:...
How to find out if a Python object is a string?
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Python 2
Use isinstance(obj, basestring) for an object-to-test obj.
Docs.
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How to determine the encoding of text?
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230
Correctly detecting the encoding all times is impossible.
(From chardet FAQ:)
However, so...
Animated GIF in IE stopping
...progressBar");
pb.innerHTML = '<img src="./progress-bar.gif" width="200" height ="40"/>';
pb.style.display = '';
}
and in your html:
<input type="submit" value="Submit" onclick="showProgress()" />
<div id="progressBar" style="display: none;">
<img src="./progress-...
Unable to import a module that is definitely installed
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32 Answers
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How to install pip for Python 3 on Mac OS X?
OS X (Mavericks) has Python 2.7 stock installed. But I do all my own personal Python stuff with 3.3. I just flushed my 3.3.2 install and installed the new 3.3.3. So I need to install pyserial again. I can do it the way I've done it before, which is:
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Regular expression to return text between parenthesis
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If your problem is really just this simple, you don't need regex:
s[s.find("(")+1:s.find(")")...