Python:Remove Duplicates from Array

Programming languages Python
#1

I’m trying to address the duplicates in an array issue using Python. I’ve discovered some ideas online, but I’m not sure which is the most practical. Tutorial: Remove Duplicates from the Array, which I cited in my work.

One choice is to use a set. A set is a particular type of data structure that only stores solitary components. We can first create a set of the array’s components in order to generate an array without duplicate elements.

def remove_duplicates(array):
  seen = set()
  new_array = []
  for element in array:
    if element not in seen:
      seen.add(element)
      new_array.append(element)
  return new_array

Utilising a hash table is a further remedy. A hash table is a type of data structure that links keys and values. A hash table can be used to transform each element of the array into a distinct numeric value. We can then add hash table elements to the new array that only have unique numbers by repeating the process.

def remove_duplicates(array):
  seen = {}
  new_array = []
  for element in array:
    if element not in seen:
      seen[element] = 1
      new_array.append(element)
  return new_array

Which of these strategies is the best outcomes? Is there a better way to remove duplicates from an array in Python?

#2

If your array contains elements that are hashable, just use something like array=list(set(array)).

#3

The hash-table option is redundant, because sets use the same hashing mechanism under the hood. See: python - How is set() implemented? - Stack Overflow

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