ISBN13 check digit: Difference between revisions
→{{header|langur}}
Langurmonkey (talk | contribs) |
Langurmonkey (talk | contribs) |
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=={{header|langur}}==
In this example, we map to multiple functions (actually 1 no-op).
<syntaxhighlight lang="langur">
val isbn13checkdigit = fn(var s) {
s -> re/^[0-9]{13}$/ and
fold(fn{+}, map
}
val
"978-0596528126": true,
"978-0596528120": false,
Line 1,983 ⟶ 1,984:
}
for
val
write
writeln if(
}
{{out}}
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