Damm algorithm: Difference between revisions
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112946 is valid |
112946 is valid |
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112949 is invalid</pre> |
112949 is invalid</pre> |
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=={{header|Vlang}}== |
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{{trans|Go}} |
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<lang vlang>const table = [ |
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[u8(0), 3, 1, 7, 5, 9, 8, 6, 4, 2], |
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[u8(7), 0, 9, 2, 1, 5, 4, 8, 6, 3], |
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[u8(4), 2, 0, 6, 8, 7, 1, 3, 5, 9], |
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[u8(1), 7, 5, 0, 9, 8, 3, 4, 2, 6], |
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[u8(6), 1, 2, 3, 0, 4, 5, 9, 7, 8], |
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[u8(3), 6, 7, 4, 2, 0, 9, 5, 8, 1], |
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[u8(5), 8, 6, 9, 7, 2, 0, 1, 3, 4], |
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[u8(8), 9, 4, 5, 3, 6, 2, 0, 1, 7], |
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[u8(9), 4, 3, 8, 6, 1, 7, 2, 0, 5], |
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[u8(2), 5, 8, 1, 4, 3, 6, 7, 9, 0], |
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] |
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fn damm(input string) bool { |
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mut interim := u8(0) |
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for c in input.bytes() { |
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interim = table[interim][c-'0'[0]] |
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} |
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return interim == 0 |
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} |
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fn main() { |
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for s in ["5724", "5727", "112946", "112949"] { |
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println("${s:6} ${damm(s)}") |
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} |
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}</lang> |
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{{out}} |
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<pre> |
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5724 true |
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5727 false |
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112946 true |
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112949 false |
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</pre> |
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=={{header|Wren}}== |
=={{header|Wren}}== |