Ruby Hash - Addition, Deletion, Selection

Hacker
Rank
Score
20144
flag of Mexico
00.00
20144
flag of India
00.00
20144
flag of United States
00.00
20144
flag of Latvia
00.00
20144
flag of United States
00.00
20144
flag of Italy
00.00

[deleted]

20144
flag of null
00.00
20144
flag of United States
00.00
20144
flag of India
00.00
20144
flag of United States
00.00
20144
flag of United States
00.00
20144
flag of Indonesia
00.00
20144
flag of Canada
00.00
20144
flag of Canada
00.00
20144
flag of India
00.00
20144
flag of United States
00.00
20144
flag of India
00.00
20144
flag of Colombia
00.00
20144
flag of United States
00.00
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