Ruby - Enumerable - group_by

Hacker
Rank
Score
01
flag of United States
15.00
01
flag of Philippines
15.00
01
flag of Canada
15.00
01
flag of New Zealand
15.00
01
flag of Canada
15.00
01
flag of Canada
15.00
01
flag of Indonesia
15.00
01
flag of Canada
15.00
01
flag of United States
15.00
01
flag of Andorra
15.00
01
flag of India
15.00
01
flag of France
15.00
01
flag of Russia
15.00
01
flag of Germany
15.00
01
flag of Nigeria
15.00
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