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cplusplus/geminitutorial/tutorial2/tutorial-2.2-followup.md

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+Take Aways:
+
+1. std::string_view: manipulation of strings without the costs of ownership:
+	i. copying and storing large string objects
+   implemented as an type storing the first element and lenght of string 
+   see  [link](https://stackoverflow.com/questions/20803826/what-is-string-view)
+
+2. Explain sync pattern or idiom in relation to string_view
+3. clang-tidy static checking -how does it work?
+