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What is the difference between an int and a long in C++?
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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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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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How to make blinking/flashing text with CSS 3
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Unique Key constraints for multiple columns in Entity Framework
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With Entity Framework 6.1, you can now do this:
[Index("IX_FirstAndSecond", 1, IsUnique = true)]
public int FirstColumn { get; set; }
[Index("IX_FirstAndSecond", 2, IsUnique = true)]
public int SecondColumn { get; set; }
The second parameter in ...
How to Select Every Row Where Column Value is NOT Distinct
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This is significantly faster than the EXISTS way:
SELECT [EmailAddress], [CustomerName] FROM [C...
RuntimeWarning: invalid value encountered in divide
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I think your code is trying to "divide by zero" or "divide by NaN". If you are aware of that a...