Se non viene fornita alcuna funzione di callback, la richiesta viene eseguita in modo sincrono. Se viene fornita una funzione di callback, la richiesta viene effettuata in modo asincrono.
La modalità asincrona è preferita perché la modalità sincrona interrompe tutto il resto del codice (ad esempio, la UI dell'editor di codice EE) durante l'attesa del server. Per effettuare una richiesta asincrona, è preferibile utilizzare evaluate() anziché getInfo().
Restituisce il valore calcolato di questo oggetto.
Utilizzo | Resi |
---|---|
Date.getInfo(callback) | Oggetto |
Argomento | Tipo | Dettagli |
---|---|---|
questo: computedobject | ComputedObject | L'istanza ComputedObject. |
callback | Funzione, facoltativa | Un callback facoltativo. Se non viene fornito, la chiamata viene effettuata in modo sincrono. |
Esempi
Editor di codice (JavaScript)
/** * WARNING: this function transfers data from Earth Engine servers to the * client. Doing so can negatively affect request processing and client * performance. Server-side options should be used whenever possible. * Learn more about the distinction between server and client: * https://developers.google.com/earth-engine/guides/client_server */ // A server-side ee.Date object. var dateServer = ee.Date('2021-4-30'); // Use getInfo to transfer server-side date to the client. The result is // an object with keys "type" and "value" where "value" is milliseconds since // Unix epoch. var dateClient = dateServer.getInfo(); print('Client-side date is an object', typeof dateClient); print('Object keys include "type" and "value"', Object.keys(dateClient)); print('"value" is milliseconds since Unix epoch', dateClient.value); print('Client-side date in JS Date constructor', new Date(dateClient.value));
import ee import geemap.core as geemap
Colab (Python)
""" WARNING: this function transfers data from Earth Engine servers to the client. Doing so can negatively affect request processing and client performance. Server-side options should be used whenever possible. Learn more about the distinction between server and client: https://developers.google.com/earth-engine/guides/client_server """ from datetime import datetime # A server-side ee.Date object. date_server = ee.Date('2021-4-30') # Use getInfo to transfer server-side date to the client. The result is # a dictionary with keys "type" and "value" where "value" is milliseconds since # Unix epoch. date_client = date_server.getInfo() print('Client-side date is a dictionary:', type(date_client)) print('Dictionary keys include "type" and "value":', date_client.keys()) print('"value" is milliseconds since Unix epoch:', date_client['value']) print('Client-side date in Python:', datetime.fromtimestamp(date_client['value'] / 1000))