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Ingy döt Net 2023-07-01 11:58:00 -04:00
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USING: kernel math math.vectors sequences ;
IN: rosetacode
: 1-order ( seq -- seq' )
[ rest-slice ] keep v- ;
: n-order ( seq n -- seq' )
dup 0 <=
[ drop ] [ [ 1-order ] times ] if ;