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vagelim/find_nth.py

Last active November 30, 2015 18:56
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Find the nth occurrence of a substring in a given string
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find_nth.py
def find_nth(haystack, needle, n):
"""Take a string (haystack) and find start the nth occurrence of the substring (needle)"""
start = haystack.find(needle)
while start >= 0 and n > 1:
start = haystack.find(needle, start+len(needle))
n -= 1
return start
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