Boustrophedon transform: Difference between revisions
Content added Content deleted
(→{{header|J}}: Alternate approach) |
m (→{{header|J}}: make M local in alternate approach) |
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<syntaxhighlight lang=J>B=: {{ |
<syntaxhighlight lang=J>B=: {{ |
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M= |
M=. |:y#,:u i.y |
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for_i.(#~>:/"1)1+(,#:i.@*)~y-1 do. |
for_i.(#~>:/"1)1+(,#:i.@*)~y-1 do. |
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M= |
M=. M (<i)}~(M{~<i-0 1)+M{~<(-/\i)-1 0 |
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end. |
end. |
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M|:~<1 0 |
M|:~<1 0 |
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