大约有 15,000 项符合查询结果(耗时:0.0279秒) [XML]

https://stackoverflow.com/ques... 

Set value for particular cell in pandas DataFrame using index

... RukTech's answer, df.set_value('C', 'x', 10), is far and away faster than the options I've suggested below. However, it has been slated for deprecation. Going forward, the recommended method is .iat/.at. Why df.xs('C')['x']=10 does not work: df.xs('C') by d...
https://stackoverflow.com/ques... 

Pass a data.frame column name to a function

I'm trying to write a function to accept a data.frame ( x ) and a column from it. The function performs some calculations on x and later returns another data.frame. I'm stuck on the best-practices method to pass the column name to the function. ...
https://stackoverflow.com/ques... 

What is the difference between currying and partial application?

I quite often see on the Internet various complaints that other peoples examples of currying are not currying, but are actually just partial application. ...
https://stackoverflow.com/ques... 

Making WPF applications look Metro-styled, even in Windows 7? (Window Chrome / Theming / Theme)

...le. Because I like to have control over everything and I didn't want some external libraries just to use a Window from it. I looked at already mentioned MahApps.Metro on GitHub and also very nice Modern UI on GitHub. (.NET4.5 only) There is one more it's Elysium but I really didn't try this on...
https://stackoverflow.com/ques... 

How to make a valid Windows filename from an arbitrary string?

...lidFileNameChars = new char[] { '"', '<', '>', '|', '\0', '\x0001', '\x0002', '\x0003', '\x0004', '\x0005', '\x0006', '\a', '\b', '\t', '\n', '\v', '\f', '\r', '\x000e', '\x000f', '\x0010', '\x0011', '\x0012', '\x0013', '\x0014', '\x0015', '\x0016', '\x0017', '\x0018', '\x001...
https://stackoverflow.com/ques... 

How to easily map c++ enums to strings

...No point in copying your string literals to std::strings in the map) For extra syntactic sugar, here's how to write a map_init class. The goal is to allow std::map<MyEnum, const char*> MyMap; map_init(MyMap) (eValue1, "A") (eValue2, "B") (eValue3, "C") ; The function template &...
https://stackoverflow.com/ques... 

The specified type member 'Date' is not supported in LINQ to Entities. Only initializers, entity mem

...tsCustomByUniqueStudentReference(userDevice.UniqueStudentReference) .Where(x => EntityFunctions.TruncateTime(x.DateTimeStart) == currentDate.Date); UPDATE: As @shankbond mentioned in comments, in Entity Framework 6 EntityFunctions is obsolete, and you should use DbFunctions class, which is ship...
https://stackoverflow.com/ques... 

Combine two or more columns in a dataframe into a new column with a new name

For example if I have this: 8 Answers 8 ...
https://stackoverflow.com/ques... 

Dealing with float precision in Javascript [duplicate]

...t. I want to group them by rounding them down to the nearest multiple of x and convert the result to a string. 5 Answer...
https://stackoverflow.com/ques... 

Sorting a Python list by two fields

...ashish, see my answer below with lambda functions this is clear, sort by "-x[1]" or even "x[0]+x[1]" if you wish – jaap Feb 27 '14 at 15:15 ...