Raul questions

• Firestore collection group update doc
• Javascript - Remove oldest elements of a map (object)
• Multiple orderBy in firestore
• How to pass a JS date object to cloud function for storing it on Firestore
• Firestore multiple users writing on same document
• What should I return in an https callable function if it doesn't expect to return nothing
• React Hooks. Pass value as argument to useReducer()
• React - useMemo without dependencies array vs empty array

Raul answers