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Combine Date and Time columns using python pandas

I have a pandas dataframe with the following columns; 11 Answers 11 ...
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How can you use optional parameters in C#?

Note: This question was asked at a time when C# did not yet support optional parameters (i.e. before C# 4). 23 Answers ...
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Checking for empty queryset in Django

What is the recommended idiom for checking whether a query returned any results? Example: 7 Answers ...
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Why is === faster than == in PHP?

Why is === faster than == in PHP? 11 Answers 11 ...
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Error: Cannot pull with rebase: You have unstaged changes

I have started collaborating with a few friends on a project & they use the heroku git repository. 8 Answers ...
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Convert integer to hexadecimal and back again

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“for” vs “each” in Ruby

I just had a quick question regarding loops in Ruby. Is there a difference between these two ways of iterating through a collection? ...
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python NameError: global name '__file__' is not defined

When I run this code in python 2.7, I get this error: 12 Answers 12 ...
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Overriding a JavaScript function while referencing the original

I have a function, a() , that I want to override, but also have the original a() be performed in an order depending on the context. For example, sometimes when I'm generating a page I'll want to override like this: ...
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UIScrollView not scrolling

I have a UIScrollView which contains many UIImageView s, UILabels, etc... the labels are much longer that the UIScrollView , but when I run the app, I cannot click and scroll down... ...