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Is there shorthand for returning a default value if None in Python? [duplicate]
...s also returns "default" if x is any falsy value, including an empty list, 0, empty string, or even datetime.time(0) (midnight).
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Changing a specific column name in pandas DataFrame
...columns = {'two':'new_name'})
In [28]: df
Out[28]:
one three new_name
0 1 a 9
1 2 b 8
2 3 c 7
3 4 d 6
4 5 e 5
Following is the docstring for the rename method.
Definition: df.rename(self, index=None, columns=None, co...
Why isn't String.Empty a constant?
...ed by Microsoft here in the Shared Source Common Language Infrastructure 2.0 Release. The file to look at is sscli20\clr\src\bcl\system\string.cs.
The Empty constant holds the empty
string value. We need to call the
String constructor so that the
compiler doesn't mark this as a
literal.
...
Determine if Android app is being used for the first time
...
Kevin DionKevin Dion
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Hidden Features of C++? [closed]
...
308
votes
Most C++ programmers are familiar with the ternary operator:
x = (y < 0)...
What should I use Android AccountManager for?
... |
edited May 23 '17 at 10:31
Community♦
111 silver badge
answered Dec 23 '11 at 10:07
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What does jquery $ actually return?
...et like an
array or access individual elements
via the indexer ($(sel)[0] for
example). More importantly, you can
also apply jQuery functions against
all the selected elements.
About returning nothing:
Does it always return an array? Does it return null?
You always get the same thi...
Proper practice for subclassing UIView?
...
300
Apple defined pretty clearly how to subclass UIView in the doc.
Check out the list below, espe...
Java naming convention for static final variables [duplicate]
...nym as a name prefix, as in:
interface ProcessStates {
int PS_RUNNING = 0;
int PS_SUSPENDED = 1;
}
Obscuring involving constant names is rare:
Constant names normally have no lowercase letters, so they will not normally obscure names of packages or types, nor will they normally s...
MySQL offset infinite rows
...ows from the 96th row
to the last:
SELECT * FROM tbl LIMIT 95, 18446744073709551615;
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