大约有 11,293 项符合查询结果(耗时:0.0203秒) [XML]

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How to add property to a class dynamically?

The goal is to create a mock class which behaves like a db resultset. 24 Answers 24 ...
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Return multiple columns from pandas apply()

...ataFrame, df_test . It contains a column 'size' which represents size in bytes. I've calculated KB, MB, and GB using the following code: ...
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Divide a number by 3 without using *, /, +, -, % operators

How would you divide a number by 3 without using * , / , + , - , % , operators? 48 Answers ...
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Use images instead of radio buttons

If I have a radio group with buttons: 8 Answers 8 ...
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How to convert an array of strings to an array of floats in numpy?

...erator now.) However, if it's already a numpy array of strings, there's a better way. Use astype(). import numpy as np x = np.array(['1.1', '2.2', '3.3']) y = x.astype(np.float) share | improve ...
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What does the “===” operator do in Ruby? [duplicate]

I've seen it used a few times lately but can't figure out what it does. Can anyone illustrate how it works? 3 Answers ...
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Break a previous commit into multiple commits

Without creating a branch and doing a bunch of funky work on a new branch, is it possible to break a single commit into a few different commits after it's been committed to the local repository? ...
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What's the difference between the atomic and nonatomic attributes?

... The last two are identical; "atomic" is the default behavior (note that it is not actually a keyword; it is specified only by the absence of nonatomic -- atomic was added as a keyword in recent versions of llvm/clang). Assuming that you are @synthesizing the method implementa...
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Why isn't my Pandas 'apply' function referencing multiple columns working? [closed]

I have some problems with the Pandas apply function, when using multiple columns with the following dataframe 6 Answers ...
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What differences, if any, between C++03 and C++11 can be detected at run-time?

It is possible to write a function, which, when compiled with a C compiler will return 0, and when compiled with a C++ compiler, will return 1 (the trivial sulution with #ifdef __cplusplus is not interesting). ...