大约有 47,000 项符合查询结果（耗时：0.0415秒） [XML]
How to replace NaN values by Zeroes in a column of a Pandas Dataframe?
...
I believe DataFrame.fillna() will do this for you.
Link to Docs for a dataframe and for a Series.
Example:
In [7]: df
Out[7]:
0 1
0 NaN NaN
1 -0.494375 0.570994
2 NaN NaN
3 1.876360 -0.229738
4 NaN NaN
In...
How to manually expand a special variable (ex: ~ tilde) in bash
...
Charle's Duffy's solution
Håkon Hægland's solution
Original answer for historic purposes (but please don't use this)
If I'm not mistaken, "~" will not be expanded by a bash script in that manner because it is treated as a literal string "~". You can force expansion via eval like this.
#!/b...
Move capture in lambda
... this is not possible yet, but with some tricks that involve helper types. Fortunately, the Clang 3.4 compiler already implements this awesome feature. The compiler will be released December 2013 or January 2014, if the recent release pace will be kept.
UPDATE: The Clang 3.4 compiler was released ...
Using sections in Editor/Display templates
I want to keep all of my JavaScript code in one section; just before the closing body tag in my master layout page and just wondering the best to go about it, MVC style.
...
What does a colon following a C++ constructor name do? [duplicate]
...he constructor. In the case of objects that have a constructor, it is a performance optimization because it avoids going through two object initializations instead of one.
An initialization list is necessary if one of the fields is a reference because a reference can never be null, not even in the ...
File Upload without Form
Without using any forms whatsoever, can I just send a file/files from <input type="file"> to 'upload.php' using POST method using jQuery. The input tag is not inside any form tag. It stands individually. So I don't want to use jQuery plugins like 'ajaxForm' or 'ajaxSubmit'.
...
Split views.py in several files
...lanation would be: when you write from views import view1 Python will look for view1 in
views.py, which is what happens in the first (original) case
views/__init__.py, which is what happens in the second case. Here, __init__.py is able to provide the view1 method because it imports it.
With th...
How does JavaScript .prototype work?
...property, checkable via obj.hasOwnProperty('propName')), the runtime looks for a property with that name on the object referenced by the [[Prototype]] instead. If the [[Prototype]] also does not have such a property, its [[Prototype]] is checked in turn, and so on. In this way, the original object's...
Best practice for Django project working directory structure
...it's hard to create a directory structure that works well and remain clean for every developer and administrator. There is some standard structure in most projects on github. But it does not show a way to organize another files and all projects on pc.
...
Why does pylint object to single character variable names?
...e detail on what gurney alex noted: you can tell PyLint to make exceptions for variable names which (you pinky swear) are perfectly clear even though less than three characters. Find in or add to your pylintrc file, under the [FORMAT] header:
# Good variable names which should always be accepted, ...