大约有 44,400 项符合查询结果（耗时：0.0570秒） [XML]
Group query results by month and year in postgresql
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select to_char(date,'Mon') as mon,
extract(year from date) as yyyy,
sum("Sales")...
How do I remove a submodule?
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2263
Since git1.8.3 (April 22d, 2013):
There was no Porcelain way to say "I no longer am inter...
Measuring text height to be drawn on Canvas ( Android )
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edited Nov 13 '17 at 20:27
Alon
31222 silver badges1616 bronze badges
answered Sep 27 '10 at 15:02
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Finding three elements in an array whose sum is closest to a given number
Given an array of integers, A 1 , A 2 , ..., A n , including negatives and positives, and another integer S. Now we need to find three different integers in the array, whose sum is closest to the given integer S. If there exists more than one solution, any of them is ok.
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What's your most controversial programming opinion?
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What does a double * (splat) operator do
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Ruby 2.0 introduced keyword arguments, and ** acts like *, but for keyword arguments. It returns a Hash with key / value pairs.
For this code:
def foo(a, *b, **c)
[a, b, c]
end
Here's a demo:
> foo 10
=> [10, [], {}]
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Difference between two dates in Python
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286
Use - to get the difference between two datetime objects and take the days member.
from datet...
What's the function like sum() but for multiplication? product()?
... return reduce(operator.mul, iterable, 1)
>>> prod(range(1, 5))
24
Note, in Python 3, the reduce() function was moved to the functools module.
Specific case: Factorials
As a side note, the primary motivating use case for prod() is to compute factorials. We already have support for that ...
How do I get the full path of the current file's directory?
...rent working directory:
import pathlib
pathlib.Path().absolute()
Python 2 and 3
For the directory of the script being run:
import os
os.path.dirname(os.path.abspath(__file__))
If you mean the current working directory:
import os
os.path.abspath(os.getcwd())
Note that before and after file ...
System.MissingMethodException: Method not found?
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