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amcgregor/iteration.py

Forked from sirpengi/gist:2898083
Created June 8, 2012 21:06
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iteration.py
def one(iterable, condition=bool):
found = False
for i in iterable:
if not condition(i): continue
if found: return False
found = True
return found
def first(iterable, condition=lambda a: True, sentinel=None):
try:
return (i for i in iterable if condition(i)).next()
except StopIteration:
return sentinel
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