Lancelot03

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# Counting Duplicates

DESCRIPTION:
Count the number of Duplicates
Write a function that will return the count of distinct case-insensitive alphabetic characters and numeric digits that occur more than once in the input string. The input string can be assumed to contain only alphabets (both uppercase and lowercase) and numeric digits.

Example:

``````"abcde" -> 0 # no characters repeats more than once
"aabbcde" -> 2 # 'a' and 'b'
"aabBcde" -> 2 # 'a' occurs twice and 'b' twice (`b` and `B`)
"indivisibility" -> 1 # 'i' occurs six times
"Indivisibilities" -> 2 # 'i' occurs seven times and 's' occurs twice
"aA11" -> 2 # 'a' and '1'
"ABBA" -> 2 # 'A' and 'B' each occur twice
``````

Solution- ###Python

``````def duplicate_count(text):
if len(text) == 0:
return 0
text=text.lower()
count=0
for i in set(text):
if text.count(i)>1:
count +=1
return count
``````

Sophist

``````def duplicate_count(text):
if len(text) == 0:
return 0
text=text.lower()
return sum(map(lambda x: text.count(x) > 1,set(text)))
``````

Lancelot03

It was good but difficult to understand for beginners.

Farrukh

Hi...do u know ML programming ?

Lancelot03 • Edited

Yhaa I right now learning Machine Learning with python