ISBN13 check digit: Difference between revisions
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Langurmonkey (talk | contribs) |
Langurmonkey (talk | contribs) |
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Line 537:
<lang langur>val .isbn13checkdigit = f(var .s) {
.s = replace(.s, RE/[\- ]/)
var .alt =
matching(re/^[0-9]{13}$/, .s) and
for[=0] .d in s2n(.s) { _for += if(not= .alt: .d x 3; .d)
}
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