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parzibyte/probar.js

Created October 3, 2019 17:00
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probar.js
/**
* Saber si carácter es dígito con JavaScript
*
* https://parzibyte.me/blog
*
*/
const esDigito = (caracter) => {
let ascii = caracter.charCodeAt(0);
return ascii > 47 && ascii < 58;
}
// Probar
const caracteres = ["A","B","0","4","_","9", " "];
caracteres.forEach(caracter => {
console.log("¿'%s' es dígito? %s", caracter, esDigito(caracter));
});
/*
Salida:
¿'A' es dígito? false
¿'B' es dígito? false
¿'0' es dígito? true
¿'4' es dígito? true
¿'_' es dígito? false
¿'9' es dígito? true
¿' ' es dígito? false
*/
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