8 lines
234 B
Factor
8 lines
234 B
Factor
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( scratchpad ) : next ( seq -- newseq )
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dup 2 tail* over length [ swap - ] curry map
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[ dupd swap nth ] map 0 [ + ] reduce suffix ;
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( scratchpad ) { 1 1 } 1000 [ next ] times dup 10 head . 999 swap nth .
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{ 1 1 2 3 3 4 5 5 6 6 }
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502
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