This practice set asks you to choose the order of operations as well as the right helper. A recent-alert window must be applied before deduplication, a strictly earlier departure excludes equal timestamps, and a JSON field can be present even when its string is empty. Those differences disappear if every task is treated as a generic filter and sort.
The data is new, but all the operations come from this unit. You will count repeated inventory names, compare neighboring readings, inspect virtual path names without opening files, and select the soonest pickups. Return values in the requested order and retain duplicates whenever they represent separate observations. The hidden cases focus on empty input, equal values, leading zeros, and malformed text around otherwise valid names.