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Damm algorithm: Difference between revisions
→{{header|JavaScript}}
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Line 748:
112946 is valid
112949 is invalid</pre>
=={{header|JavaScript}}==
<lang JavaScript>const table = [
[0, 3, 1, 7, 5, 9, 8, 6, 4, 2],
[7, 0, 9, 2, 1, 5, 4, 8, 6, 3],
[4, 2, 0, 6, 8, 7, 1, 3, 5, 9],
[1, 7, 5, 0, 9, 8, 3, 4, 2, 6],
[6, 1, 2, 3, 0, 4, 5, 9, 7, 8],
[3, 6, 7, 4, 2, 0, 9, 5, 8, 1],
[5, 8, 6, 9, 7, 2, 0, 1, 3, 4],
[8, 9, 4, 5, 3, 6, 2, 0, 1, 7],
[9, 4, 3, 8, 6, 1, 7, 2, 0, 5],
[2, 5, 8, 1, 4, 3, 6, 7, 9, 0],
];
const lookup = (p, c) => table[p][parseInt(c, 10)]
const damm = input => [...input].reduce(lookup, 0) === 0;
// ----------------------------------------------------------[ Tests ]----
const test = () => ["5724", "5727", "112946", "112949"].forEach(e =>
console.log(`${e} => ${damm(e) ? 'Pass' : 'Fail'}`)
);
test();
</lang>
{{out}}
<pre>
5724 => Pass
5727 => Fail
112946 => Pass
112949 => Fail
</pre>
=={{header|Julia}}==
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