Add consume() recipe to itertools docs.
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@ -701,6 +701,10 @@ which incur interpreter overhead.
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"Return function(0), function(1), ..."
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return imap(function, count(start))
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def consume(iterator, n):
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"Advance the iterator n-steps ahead. If n is none, consume entirely."
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collections.deque(islice(iterator, n), maxlen=0)
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def nth(iterable, n, default=None):
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"Returns the nth item or a default value"
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return next(islice(iterable, n, None), default)
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