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condense ISBN generator

This commit is contained in:
David 2021-08-01 19:09:54 -04:00
parent fbcd59c7f0
commit 9e4f10a7e0
1 changed files with 1 additions and 8 deletions
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9
frontend/files/index.html
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@ -158,14 +158,7 @@
ISBN = EAN.slice(3, 12); ISBN = EAN.slice(3, 12);
var checkdigit = var checkdigit =
(11 - (11 -
(_.reduce( (_.reduce(ISBN.split(""), (s, n, k) => s + n * (10 - k), 0) % 11)) %
ISBN.split(""),
function (sum, num, key) {
return sum + num * (10 - key);
},
0
) %
11)) %
11; 11;
return ISBN + (checkdigit == 10 ? "X" : checkdigit); return ISBN + (checkdigit == 10 ? "X" : checkdigit);
} }