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Cristian Fernando
Cristian Fernando

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Paracetamol.js💊| #26: Explica este código JavaScript

#javascript #webdev #beginners #spanish

¿Qué imprime este código JavaScript? 

let person = { name: "Lydia" };
const members = [person];
person = null;

console.log(members);
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  • A: null
  • B: [null]
  • C: [{}]
  • D: [{ name: "Lydia" }]

Respuesta en el primer comentario.

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duxtech profile image
Cristian Fernando •

Respuesta:

  • D: [{ name: "Lydia" }]

Cuando hacemos:

const members = [person];
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En realidad estamos realizando una copia a la referencia de person, tanto person como members apuntan a la misma referencia del objeto en memoria.

Por este motivo al hacer:

person = null;
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Cambiamos el valor de person a null pero members conserva la referencia al objeto y por ello también su valor.

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