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SQLAlchemy: What's the difference between flush() and commit()?
...e same state as
# Foo('A') was above.
print 3, s2.query(Foo).all()
s2.rollback() # Foo('B') has not been committed, and rolling
# back the session's transaction removes it
# from the session....
What does the “@” symbol do in Powershell?
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Don JonesDon Jones
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Which is the first integer that an IEEE 754 float is incapable of representing exactly?
...nded is:
For float, 16,777,217 (224 + 1).
For double, 9,007,199,254,740,993 (253 + 1).
>>> 9007199254740993.0
9007199254740992
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follo...
Counting the occurrences / frequency of array elements
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How to design a product table for many kinds of product where each product has many parameters
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237
You have at least these five options for modeling the type hierarchy you describe:
Single Tab...
What does “Auto packing the repository for optimum performance” mean?
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314
Short version: it means what it says, and if you just let it finish, all will be well.
During...
Find indices of elements equal to zero in a NumPy array
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numpy.where() is my favorite.
>>> x = numpy.array([1,0,2,0,3,0,4,5,6,7,8])
>>> numpy.where(x == 0)[0]
array([1, 3, 5])
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GRANT EXECUTE to all stored procedures
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answered Feb 17 '12 at 1:13
Antony ScottAntony Scott
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Is there a CSS selector by class prefix?
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382
It's not doable with CSS2.1, but it is possible with CSS3 attribute substring-matching selecto...