大约有 14,100 项符合查询结果（耗时：0.0312秒） [XML]
Is there a difference between x++ and ++x in java?
Is there a difference between ++x and x++ in java?
16 Answers
16
...
How to change Git log date formats
...an change the second line to format that timestamp however you want. This example gives you something similar to --date=local, with a padded day.
And if you want permanent effect without typing this every time, try
git config log.date iso
Or, for effect on all your git usage with this account...
Add column with constant value to pandas dataframe [duplicate]
...
The reason this puts NaN into a column is because df.index and the Index of your right-hand-side object are different. @zach shows the proper way to assign a new column of zeros. In general, pandas tries to do as much alignment of indices as possible. One downside is that when indi...
How to toggle a value in Python
...re boolean, the fastest approach is to use the not operator:
>>> x = True
>>> x = not x # toggle
>>> x
False
>>> x = not x # toggle
>>> x
True
>>> x = not x # toggle
>>> x
False
Solution using subtraction
If the ...
When should I use cross apply over inner join?
...
Can anyone give me a good example of when CROSS APPLY makes a difference in those cases where INNER JOIN will work as well?
See the article in my blog for detailed performance comparison:
INNER JOIN vs. CROSS APPLY
CROSS APPLY works better on thi...
Access lapply index names inside FUN
Is there a way to get the list index name in my lapply() function?
12 Answers
12
...
Python `if x is not None` or `if not x is None`?
I've always thought of the if not x is None version to be more clear, but Google's style guide and PEP-8 both use if x is not None . Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convent...
How to add a browser tab icon (favicon) for a website?
...ing code to the <head> element:
<link rel="icon" href="http://example.com/favicon.png">
PNG favicons are supported by most browsers, except IE <= 10. For backwards compatibility, you can use ICO favicons.
Note that you don't have to precede icon in rel attribute with shortcut an...
How to generate a range of numbers between two numbers?
I have two numbers as input from the user, like for example 1000 and 1050 .
28 Answers
...
How does the @property decorator work in Python?
...pecial descriptor object:
>>> property()
<property object at 0x10ff07940>
It is this object that has extra methods:
>>> property().getter
<built-in method getter of property object at 0x10ff07998>
>>> property().setter
<built-in method setter of property...