Re: [basex-talk] Set Operator Examples

Hej Arto,

One can even improve your map2 by using the [Simple map operator].

declare function local:difference-map-2-excl($a, $b) { let $m2 := map:new($b ! map:entry(., true())) return $a ! (if($m2(.)) then () else .) };

- map 299.47 ms - map2 290.96 ms - map2 + ! 128.25 ms

cheers Arve

[Simple map operator] http://www.w3.org/TR/xquery-30/#id-map-operator

Am 25.09.13 10:41 schrieb Arto Viitanen:

-----Original Message----- From: Arve Gengelbach [mailto:ag@basex.org] Sent: 25. syyskuuta 2013 9:08 To: Arto Viitanen Cc: basex-talk@mailman.uni-konstanz.de Subject: Re: [basex-talk] Set Operator Examples

Hej Arto,

just being interested: How does it compare to a FLOWR expression?

declare function local:difference-flowr($a, $b) { for $x in $a where not($x = $b) group by $x return $x[1] };

pred 51787.06 ms map 485.16 ms map2 325.09 ms flowr 45275.97 ms

-- Arto Viitanen Finland