Validación de cédulas y similares (Algoritmo de Luhn)

for.js

const ced = '0931811087';

let [suma, mul, chars] = [0, 1, ced.length];
for (let index = 0; index < chars; index += 1) {
  let num = ced[index] * mul;
  suma += num - (num > 9) * 9;
  mul = 1 << index % 2;
}

if ((suma % 10 === 0) && (suma > 0)) {
  console.log('Pasa.');
} else {
  console.error('No pasa.');
}

reduce.js

const ced = '0931811087'.split('');

let mul = 1;
const suma = ced.reduce((acc, num, index) => {
  num *= mul;
  mul = 1 << index % 2;
  return acc * 1 + (num - (num > 9) * 9);
});

if ((suma % 10 === 0) && (suma > 0)) {
  console.log('Pasa.');
} else {
  console.error('No pasa.');
}

while.js

const ced = '0931811087';

let [suma, mul, index] = [0, 1, ced.length];
while (index--) {
  let num = ced[index] * mul;
  suma += num - (num > 9) * 9;
  mul = 1 << index % 2;
}

if ((suma % 10 === 0) && (suma > 0)) {
  console.log('Pasa.');
} else {
  console.error('No pasa.');
}

https://jsperf.com/cedula-while-for-reduce

https://jsperf.com/cedula-while-for-reduce

not valid, can you update it pls?

Hola intente usar for para la validacion pero no funciona con algunos numeros de cedula Sobretodo de Galapagos

help me with
def

does anyone have an example with ruc.