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Efficient list of unique strings C#

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How to check whether a file or directory exists?

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what is the preferred way to mutate a React state?

... | edited May 31 '14 at 21:45 Brigand 72.4k1717 gold badges147147 silver badges162162 bronze badges an...
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Convert a list to a data frame

...in the df? – N.Varela Dec 18 '15 at 21:47  |  show 8 more comments ...
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How can I convert a DOM element to a jQuery element?

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Regex to replace everything except numbers and a decimal point

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Default parameter for CancellationToken

... 21 From MSDN CancellationToken.None Property: "You can also use the C# default(CancellationToken) statement to create an empty cancellation to...
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How do I ignore the initial load when watching model changes in AngularJS?

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How to replace text between quotes in vi

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How to determine whether a Pandas Column contains a particular value

... in s Out[14]: False One option is to see if it's in unique values: In [21]: s.unique() Out[21]: array(['a', 'b', 'c'], dtype=object) In [22]: 'a' in s.unique() Out[22]: True or a python set: In [23]: set(s) Out[23]: {'a', 'b', 'c'} In [24]: 'a' in set(s) Out[24]: True As pointed out by @D...