JSON Objects

The jsn values represent JSON objects with native support for nested properties, lists, and utility methods.

Declaration

jsn persona = {
    nombre: "Ana",
    edad: 28,
    activo: verdadero
}

Note

To modify a JSON object after creation, you must declare it with var.

Property Access

Dot Notation

texto nombre = persona.nombre
numero peso = persona.datos_personales.peso

Bracket Notation

texto nombre = persona["nombre"]
texto especial = datos["clave con espacios"]

JSON Methods

Key Verification

Method	Description	Returns
contiene_clave(clave)	Checks if property exists	log

Get Keys and Values

Method	Description	Returns
claves()	List of first-level keys	lista<texto>
valores()	List of first-level values	lista

Modify Properties

Method	Description
establecer(clave, valor)	Assign or create a property
eliminar(clave)	Delete a property and return its value

Merge Objects

Method	Description
fusionar(otro_json)	Combine properties (existing ones are overwritten)

Serialization

Method	Description
texto()	Serialize to compact JSON
texto_formateado()	Serialize with readable indentation

Conversion from Text

texto json_texto = '{"nombre":"Ana","edad":25}'
jsn var persona = json_texto.jsn()

Caution

If the string is not valid JSON, an exception is thrown. Use intentar/capturar to handle errors.

Best Practices

1. Declare with var JSON objects you need to modify.
2. Use contiene_clave() before accessing properties that might not exist.
3. Validate external JSON with intentar/capturar when parsing strings.
4. Use texto_formateado() for debugging and readable logs.