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Alex Rivera
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I was looking around stackoverflow Non-Trivial Lazy Evaluation , which led me to Keegan McAllister's presentation: Why learn Haskell . In slide 8, he shows the minimum function, defined as: minimum = head . sort and states that its complexity is O(n). I don't understand why the complexity is said to be linear if sorting by replacement is O(nlog n). The sorting referred in the post can't be linear, as it does not assume anything about the data, as it would be required by linear sorting methods, such as counting sort. Is lazy evaluation playing a mysterious role in here? If so, what is the explanation behind it?
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