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Ingy döt Net 2023-07-01 11:58:00 -04:00
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10
Task/Increasing-gaps-between-consecutive-Niven-numbers/J/increasing-gaps-between-consecutive-niven-numbers-1.j Normal file
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tasks=: (gap , (,:~ index))@:niven
gap=: 0 ,~ 2 -~/\ ]
index=: i.@:#
niven=: I.@:nivenQ@:i.
nivenQ=: 0 = (|~ ([: (+/"1) 10&#.^:_1))
assert 1 0 1 -: nivenQ 10 11 12 NB. demonstrate correct niven test
assert 1 = +/ 10 12 E. niven 100 NB. the sublist 10 12 occurs once in niven numbers less than 100
assert 0 1 6 90 -: gap 1 2 8 98 NB. show infix swapped subtractions

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Task/Increasing-gaps-between-consecutive-Niven-numbers/J/increasing-gaps-between-consecutive-niven-numbers-2.j Normal file
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( ~. ( >./\ ( 2 -~/\ A ) ) )

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Task/Increasing-gaps-between-consecutive-Niven-numbers/J/increasing-gaps-between-consecutive-niven-numbers-3.j Normal file
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A