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GroupBy pandas DataFrame and select most common value
I have a data frame with three string columns. I know that the only one value in the 3rd column is valid for every combination of the first two. To clean the data I have to group by data frame by first two columns and select most common value of the third column for each combination.
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inserting characters at the start and end of a string
I am new and trying to find a way to insert a number of L's at the beginning and end of a string. So if I have a string which says
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Why use Ruby's attr_accessor, attr_reader and attr_writer?
Ruby has this handy and convenient way to share instance variables by using keys like
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Why in Java 8 split sometimes removes empty strings at start of result array?
Before Java 8 when we split on empty string like
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How do I decode a string with escaped unicode?
I'm not sure what this is called so I'm having trouble searching for it. How can I decode a string with unicode from http\u00253A\u00252F\u00252Fexample.com to http://example.com with JavaScript? I tried unescape , decodeURI , and decodeURIComponent so I guess the only thing left is string r...
How do I add 1 day to an NSDate?
Basically, as the title says. I'm wondering how I could add 1 day to an NSDate .
28 Answers
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Should one use < or
If you had to iterate through a loop 7 times, would you use:
39 Answers
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How can I increment a char?
I'm new to Python, coming from Java and C. How can I increment a char? In Java or C, chars and ints are practically interchangeable, and in certain loops, it's very useful to me to be able to do increment chars, and index arrays by chars.
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jQuery equivalent of getting the context of a Canvas
I have the following working code:
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How do I declare a 2d array in C++ using new?
How do i declare a 2d array using new?
24 Answers
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