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What is the 'pythonic' equivalent to the 'fold' function from functional programming?
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edited Sep 21 '19 at 0:30
goetzc
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answered Apr ...
Joda-Time: what's the difference between Period, Interval and Duration?
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3 classes are needed because they represent different concepts so it is a matter of picking the appropriate one for the job rather than of relative performance. From the documentation with comments added by me in italics:
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Determine a string's encoding in C#
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31
Check out Utf8Checker it is simple class that does exactly this in pure managed code.
http://ut...
How to handle exceptions in a list comprehensions?
...rtelli
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14
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How to convert a string of numbers to an array of numbers?
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39
My 2 cents for golfers:
b="1,2,3,4".split`,`.map(x=>+x)
backquote is string litteral so w...
Rails 3: Get Random Record
...NDOM()") # For MySQL :order => "RAND()", - thanx, @DanSingerman
# Rails 3
Thing.order("RANDOM()").first
or
Thing.first(:offset => rand(Thing.count))
# Rails 3
Thing.offset(rand(Thing.count)).first
Actually, in Rails 3 all examples will work. But using order RANDOM is quite slow for big ta...
Calculating arithmetic mean (one type of average) in Python
... return float(sum(numbers)) / max(len(numbers), 1)
>>> mean([1,2,3,4])
2.5
>>> mean([])
0.0
In numpy, there's numpy.mean().
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The most efficient way to implement an integer based power function pow(int, int)
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396
Exponentiation by squaring.
int ipow(int base, int exp)
{
int result = 1;
for (;;)
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Best way to make Java's modulus behave like it should with negative numbers?
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edited Sep 13 '14 at 10:44
Maarten Bodewes
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