WeakMap and WeakSet #176
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WeakMap and WeakSet #176
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cortizg
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Jun 9, 2020
| Otra solución diferente podría ser agregar una propiedad como `message.isRead = true` a un mensaje después de leerlo. Como los objetos de mensajes son administrados por otro código, generalmente se desaconseja, pero podemos usar una propiedad simbólica para evitar conflictos. | ||
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| Like this: | ||
| ```js |
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| --- | ||
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| # Almacenar banderas "no leídas" |
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Mencionaba Joaquin que banderas se deja como flags, tal como hace MDN
| # Almacenar banderas "no leídas" | ||
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| Hay un array de mensajes: | ||
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array es arreglo, incluso MDN dice arreglo
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| # Almacenar fechas de lectura | ||
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| Hay un array semejante al de la actividad anterior [previous task](info:task/recipients-read). La sitación es similar: |
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array es arreglo https://developer.mozilla.org/es/docs/Glossary/Arreglos
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| En la tarea anterior solo necesitábamos almacenar el hecho de "sí / no". Ahora necesitamos almacenar la fecha, y solo debe permanecer en la memoria hasta que el mensaje sea recolectado como basura. | ||
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| P.D Las fechas se pueden almacenar como objetos de la clase incorporada `Fecha`, que cubriremos más adelante. |
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la clase incorporada (builtin) se llama Date: OJO
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| Por lo general, las propiedades de un objeto o elementos de un array u otra estructura de datos se consideran accesibles y se mantienen en la memoria mientras esa estructura de datos permanezca en la memoria. | ||
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| Por ejemplo, si colocamos un objeto en un array, mientras el array esté vivo, el objeto también estará vivo, incluso si no hay otras referencias a él. |
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array es arreglo https://developer.mozilla.org/es/docs/Glossary/Arreglos
| john = null; // sobrescribe la referencia | ||
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| *!* | ||
| // John se almacena dentro del array, por lo que no será recolectado por el recolector de basura |
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busqueda y reemplazo con editor de texto array por arreglo
cortizg
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Jun 9, 2020
1-js/05-data-types/weakmap-weakset/01-recipients-read/solution.md
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Please make the requested changes. After it, add a comment "/done". |
Co-authored-by: Carlos Ortiz Gutiérrez <56600925+cortizg@users.noreply.github.com>
Co-authored-by: Carlos Ortiz Gutiérrez <56600925+cortizg@users.noreply.github.com>
…k.md Co-authored-by: Carlos Ortiz Gutiérrez <56600925+cortizg@users.noreply.github.com>
Co-authored-by: Carlos Ortiz Gutiérrez <56600925+cortizg@users.noreply.github.com>
joaquinelio
approved these changes
Jun 14, 2020
1-js/05-data-types/weakmap-weakset/01-recipients-read/solution.md
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Co-authored-by: joaquinelio <joaquinelio@gmail.com>
Co-authored-by: joaquinelio <joaquinelio@gmail.com>
Co-authored-by: joaquinelio <joaquinelio@gmail.com>
Co-authored-by: joaquinelio <joaquinelio@gmail.com>
Co-authored-by: joaquinelio <joaquinelio@gmail.com>
Co-authored-by: joaquinelio <joaquinelio@gmail.com>
Co-authored-by: joaquinelio <joaquinelio@gmail.com>
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Thank you 💖 I updated the Progress Issue #17 🎉 🎉 🎉 |
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