Created
August 29, 2019 11:55
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Validar cédula dominicana, con guiones y sin guiones Javascript
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function isValid(str) { | |
var regex = new RegExp("^[0-9]{3}-?[0-9]{7}-?[0-9]{1}$"); | |
if (!regex.test(str)) { | |
return false; | |
} | |
str = str.replace(/-/g, ''); | |
return CheckDigit(str); | |
} | |
function CheckDigit(str) { | |
var sum = 0; | |
for (var i = 0; i < 10; ++i) { | |
var n = ((i + 1) % 2 != 0 ? 1 : 2) * parseInt(str.charAt(i)); | |
sum += (n <= 9 ? n : n % 10 + 1); | |
} | |
var dig = ((10 - sum % 10) % 10); | |
return dig == parseInt(str.charAt(10)); | |
} | |
console.log(isValid("CEDULA-CON-GUIONES")); | |
console.log(isValid("CEDULASINGUIONES")); |
Verifica el dígito verificador https://es.m.wikipedia.org/wiki/Algoritmo_de_Luhn
el digito verificador es el que se encaga de comprobar que el valor insertado está dentro del rango de valores aceptados.
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Para que serviria CheckDigit???