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Answers and rating deltas for

How to insert into json file without deleting the previous data?

Author Votes Δ
Alexander 2 +2.63
Ashiq Hassan 2 +2.81
Hùng Phạm 1 -2.78
CodingYoshi 1 -0.33
Last visited: Jan 1, 2019, 8:55:20 AM