checkdigit.verhoeffΒΆ
The first check digit algorithm to detect all transposition and single digit errors.
Developed by Jacobus Verhoeff and published in 1969. This particular implementation uses a table-based algorithm.
Functions
Calculates a Verhoeff check digit. |
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Calculates a missing digit in a Verhoeff code. |
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Validates a Verhoeff check digit. |