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Re: [xsl] Duplicates in a sequence ?
Subject: Re: [xsl] Duplicates in a sequence ? From: "Leo Studer leo.studer@xxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Fri, 27 Mar 2015 11:16:05 -0000 |
Thanks, makes sense. > On 27.03.2015, at 12:09, Michael Kay mike@xxxxxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > >> >> I agree the above is O(n^2) with no duplicates. However I wonder how distinct-values is implemented with Saxon that you say it is O(n log n). What intrigues me is that the order does not change on Oxygen 16.1. >> > > Saxon's implementation of distinct-values($input) is basically: > > HashSet set = new HashSet(); > for each x in $input > if (!set.contains(x)) { > set.add(x); > result.add(x); > } > } > > except that the code is inverted to make it streamable.
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