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December 29, 2015 19:48
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| hash = { | |
| :carol => 'cancer', | |
| :jaince => 'taurus', | |
| :ting => 'twines', | |
| :jerry => 'cancer' | |
| } | |
| ratings = Hash.new(0) | |
| hash.values.each {|rate| ratings[rate] += 1} | |
| # L9 equals to below. | |
| ratings['cancer'] += 1 | |
| ratings['taurus'] += 1 | |
| ratings['twines'] += 1 | |
| ratings['cancer'] += 1 |
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