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C++0x lambda capture by value always const?
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167
Use mutable.
auto bar = [=] () mutable -> bool ....
Without mutable you are declaring t...
Regex match one of two words
...his will do:
/^(apple|banana)$/
to exclude from captured strings (e.g. $1,$2):
(?:apple|banana)
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How to retrieve inserted id after inserting row in SQLite using Python?
...) VALUES (?,?)',
('test','test'))
print(cursor.lastrowid)
# 1
If two people are inserting at the same time, as long as they are using different cursors, cursor.lastrowid will return the id for the last row that cursor inserted:
cursor.execute('INSERT INTO foo (username,password) VA...
When do I need to use a semicolon vs a slash in Oracle SQL?
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31
It's a matter of preference, but I prefer to see scripts that consistently use the slash - this ...
Is $(document).ready necessary?
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127
Is $(document).ready necessary?
no
if you've placed all your scripts right before the &l...
How to add item to the beginning of List?
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Matt HamiltonMatt Hamilton
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Is it possible to select the last n items with nth-child?
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edited Mar 31 '17 at 4:17
Gleb Kemarsky
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Visual Studio Wcf Test Client - entering an Int array
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1 Answer
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Add column with number of days between dates in DataFrame pandas
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df['A'] = pd.to_datetime(df['A'])
df['B'] = pd.to_datetime(df['B'])
In [11]: df.dtypes # if already datetime64 you don't need to use to_datetime
Out[11]:
A datetime64[ns]
B datetime64[ns]
dtype: object
In [12]: df['A'] - df['B']
Out[12]:
one -58 days
two -26 days
dtype: timedelta64[ns...
Creating my own Iterators
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41
You should use Boost.Iterators. It contains a number of templates and concepts to implement new ...