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Calculating Pearson correlation and significance in Python
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16 Answers
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Circle line-segment collision detection algorithm?
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// either solution may be on or off the ray so need to test both
// t1 is always the smaller value, because BOTH discriminant and
// a are nonnegative.
float t1 = (-b - discriminant)/(2*a);
float t2 = (-b + discriminant)/(2*a);
// 3x HIT cases:
// -o-> --|--&...
Turning live() into on() in jQuery
...ethods:
$(selector).live(events, data, handler); // jQuery 1.3+
$(document).delegate(selector, events, data, handler); // jQuery 1.4.3+
$(document).on(events, selector, data, handler); // jQuery 1.7+
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What is the difference between an int and a long in C++?
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112
It is implementation dependent.
For example, under Windows they are the same, but for examp...
Python memoising/deferred lookup property decorator
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12
For all sorts of great utilities I'm using boltons.
As part of that library you have cachedpro...
What is the fastest integer division supporting division by zero no matter what the result is?
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107
Inspired by some of the comments I got rid of the branch on my Pentium and gcc compiler using
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Selecting with complex criteria from pandas.DataFrame
...; from random import randint
>>> df = pd.DataFrame({'A': [randint(1, 9) for x in range(10)],
'B': [randint(1, 9)*10 for x in range(10)],
'C': [randint(1, 9)*100 for x in range(10)]})
>>> df
A B C
0 9 40 300
1 9 70 700
2 5 70 90...
Generating all permutations of a given string
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How do I merge a list of dicts into a single dict?
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10 Answers
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How to Select Every Row Where Column Value is NOT Distinct
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271
This is significantly faster than the EXISTS way:
SELECT [EmailAddress], [CustomerName] FROM [C...