Debug SwiftUI Task App State and Memory | Dataford Interview Questions

Speechify's task manager records field updates for each task as they arrive. Given an unordered list of update events, reconstruct the final state of every task after applying only the latest update for each field.

Specification

Each event is a dictionary with four keys: task_id (integer), field (string), value (any JSON value), and timestamp (integer). Return a dictionary mapping each task_id to another dictionary of its final field values. For the same (task_id, field), the event with the largest timestamp wins. If two events for the same (task_id, field) have the same timestamp, the later event in the input list wins.

Constraints

1 <= len(events) <= 10^5
1 <= task_id <= 10^9
timestamp is an integer
field is a non-empty string
value is any valid JSON value
Each event contains exactly the keys task_id, field, value, and timestamp

Function Signature

def restore_task_state(events):

Your question is Debug SwiftUI Task App State and Memory. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Specification

Constraints

1 <= len(events) <= 10^5
1 <= task_id <= 10^9
timestamp is an integer
field is a non-empty string
value is any valid JSON value
Each event contains exactly the keys task_id, field, value, and timestamp

Function Signature

def restore_task_state(events):

Your question is Debug SwiftUI Task App State and Memory. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.