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How to apply a function to two columns of Pandas dataframe

Suppose I have a df which has columns of 'ID', 'col_1', 'col_2' . And I define a function : 12 Answers ...
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What is the status of JSR 305?

I have seen the question JSR305 vs. JSR308 (Java Type Anotations) - Which is going to be the standard? and I understand the difference between JSR 308 and JSR 305 . ...
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Collection that allows only unique items in .NET?

... If all you need is to ensure uniqueness of elements, then HashSet is what you need. What do you mean when you say "just a set implementation"? A set is (by definition) a collection of unique elements that doesn't save element ...
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How to find indices of all occurrences of one string in another in JavaScript?

I'm trying to find the positions of all occurrences of a string in another string, case-insensitive. 13 Answers ...
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Email validation using jQuery

...ming more common this regex may need modifying .systems and .poker etc are all valid TLDs now but would fail the regex check – Liath Sep 5 '14 at 7:35 3 ...
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How do I make calls to a REST api using C#?

...and this thread is one of the top results when doing a Google search for "call restful service c#". Current guidance from Microsoft is to use the Microsoft ASP.NET Web API Client Libraries to consume a RESTful service. This is available as a NuGet package, Microsoft.AspNet.WebApi.Client. You will n...
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Why doesn't Internet Explorer 11 honour conditional comments even when emulating Internet Explorer 8

...14. In running a few tests myself it does appear that this was fixed and all is running smoothly again for testing the most amazing browser ever produced...Internet Explorer! share | improve this ...
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Python dictionary: Get list of values for list of keys

...n list-comp: Build list and throw exception if key not found: map(mydict.__getitem__, mykeys) Build list with None if key not found: map(mydict.get, mykeys) Alternatively, using operator.itemgetter can return a tuple: from operator import itemgetter myvalues = itemgetter(*mykeys)(mydict) # use ...
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Python assigning multiple variables to same value? list behavior

...the same identical value. Variables have types, identities, addresses, and all kinds of stuff like that. Names don't have any of that. Values do, of course, and you can have lots of names for the same value. If you give Notorious B.I.G. a hot dog,* Biggie Smalls and Chris Wallace have a hot dog. ...
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Facebook Callback appends '#_=_' to Return URL

Facebook callback has started appending #_=_ hash underscore to the Return URL 23 Answers ...