4 ms·

what is the value of an "update or insert" call on `Map`? is that not just set? `getOrInsert` here seems to be the Python "set_default" method on dicts, which

• AdieuToLogic 4mo ago
  > what is the value of an "update or insert" call on `Map`? It gives a caller the option of alternate logic based on the existence, or lack thereof, of a value. > is that not just set? No. The semantics of a "set" operation would overwrite an existing entry (if one exists).
• Klaster_1 4mo ago
  I do this all the time, getOrInsert would come really handy: you need something from a Map-backed storage, but the value may be unset, so you first check if it's undefined, set the default value, and then use that. Example: update(store, (draft) => { if (!draft.alertConfigurations.has(req.params.clusterId)) draft.alertConfigurations.set(req.params.clusterId, new Map()); const clusterAlerts = draft.alertConfigurations.get(req.params.clusterId); req.body.forEach((alert) => clusterAlerts.set(alert.id, { ...alert, predefined: false })); });