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Re: How the other half live

Subject: Re: How the other half live
From: Michael Ludwig <mlu@xxxxxxxxxxxxx>
Date: Tue, 18 Nov 2008 18:03:22 +0100
Re:  How the other half live
Andrew Welch schrieb:
2008/11/18 Michael Kay <mike@xxxxxxxxxxxx>:
for $d in distinct-values($seq) return $d[count($seq[. eq $d]) ge $i]

They are both O(n^2).

$vSeq[index-of($vSeq,.)[$i]]

...would be O(n^2) for both best and worst cases - right?

With $vSeq being immutable, wouldn't the expression index-of( $vSeq, $i) be memoized after the first evaluation?

Isn't that one of the advantages of the functional paradigm?
(Not that I'm qualified enough to know this - just asking.)

Would you then still call it O(n^2) or O(n*m) ?

Michael Ludwig

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