this repo helps you to deal with helping function for list/array of float64 datatype
-Find takes the key to find and list from where to search. return bool
-IfFindRemove -IfNotFindAdd -DuplicacyCheck -DuplicacyRemove takes 2 input , value and list[] and the functionality is clear by its name.
-Nearest takes input and list[] and find nearest to the number in list.