How do you ignore a case?

You ignore case when you treat the data , not when you retrieve/store it. If you want to store everything in lowercase use String#toLowerCase, in uppercase use String#toUpperCase. Then when you have to actually treat it, you may use out of the bow methods, like String#equalsIgnoreCase(java.

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Does STR contain?

contains() function is used to test if pattern or regex is contained within a string of a Series or Index. The function returns boolean Series or Index based on whether a given pattern or regex is contained within a string of a Series or Index.22 Eki 2021

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