Function filterFn

packages/db/src/collection/change-events.ts:348–354

(key: TKey)

      if (index && index.supports(`gt`)) {
        // Use index optimization
        const filterFn = (key: TKey): boolean => {
          const value = collection.get(key)
          if (value === undefined) {
            return false
          }
          return whereFilter?.(value) ?? true
        }

        // Take the keys that match the filter and limit
        // if no limit is provided `index.keyCount` is used,