i need help with this andela lab test, please its urgent

Question

Write a function called remove_duplicates which will take one argument called string. This string input will only have characters between a-z.

The function should remove all repeated characters in the string and return a tuple with two values:

A new string with only unique, sorted characters.

The total number of duplicates dropped.

For example:

remove_duplicates('aaabbbac') => ('abc', 5)

remove_duplicates('a') => ('a', 0)

remove_duplicates('thelexash') => ('aehlstx', 2)

Answer 1

Here is the code:

https://code.sololearn.com/cYQ6B5rP85Dv/?ref=app

Answer 2

#defines the function
def remove_duplicates(some_str):

#creates an array where we will store our characters
chars = []

#create a variable where we will store our number of duplicates
numOfDuplicates = 0

#goes through all the letters in the string
for letter in some_str:
#how many letter do we have?
startLength = len(some_str)

#we add the letter to our types of letters(chars)
chars.append(letter)

#then we delete all the letters of this type so we don't add them to chars again
some_str.replace(letter, "")

#how many letter do we have now?
newLength = len(some_str)

#Now we calculate how many duplicates were deleted and add that number
#to the total number of duplicates
numOfDuplicates += startLength - newLength + 1

#now we sort the letters
chars.sort()

#and now we join them
final_str = "".join(chars)

#And finally!!!
print(final_str, numberOfDuplicates)

Answer 3

How can this code be written in JavaScript?