Question

Write a method named removeDuplicates that accepts as a parameter a List of integers, and modifies it by removing any duplicates. Note that the elements of the list are not in any particular order, so the duplicates might not occur consecutively. You should retain the original relative order of the elements. Use a Set as auxiliary storage to help you solve this problem.
For example, if a list named list stores [4, 0, 2, 9, 4, 7, 2, 0, 0, 9, 6, 6], the call of removeDuplicates(list); should modify it to store [4, 0, 2, 9, 7, 6].

Answer 1

The method is an illustration of loops or iteration.

Loops are used to carry out repetitive operations.

The removeDuplicates method in Python is as follows, where comments are used to explain each line.

#This defines the method

def removeDuplicates(list):

#This initializes the output list

   outputList = []

#This iterates through the list

   for i in list:

#All elements not in the output list, are appended to the output list

       if i not in outputList:

           outputList.append(i)

#This returns the output list

   return str(outputList)

At the end of the method, the new list contains no duplicates.

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