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Optimize all-unique-characters.py #5

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Merged
merged 1 commit into from
Feb 8, 2017
Merged

Optimize all-unique-characters.py #5

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8 changes: 7 additions & 1 deletion solutions/python/all-unique-characters.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,14 @@
import unittest

def all_unique(string):

# Optimization that assumes only 255 ASCII characters are possible (ignores possibility of unicode)
nLetters = len(letters)
if (nLetters > 255):
return False

letters = sorted(string)
for i in range(len(letters) - 1):
for i in range(nLetters - 1):
if letters[i] == letters[i + 1]:
return False
return True
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