Ruby:Hash 排序
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Ruby:Hash 排序
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people = {:fred => 23,:joan => 18,:pete => 54
}
?年齡排序:
people.values.sort # => [18, 23, 54]姓名排序:
people.sort_by { |name, age| age }# => [[:joan, 18], [:fred, 23], [:pete, 54]]?或者
people.sort?
一個復雜點的hash
people = {:fred => { :name => "Fred", :age => 23 },:joan => { :name => "Joan", :age => 18 },:pete => { :name => "Pete", :age => 54 } }?
people.sort_by { |k, v| v[:age] }# => [[:joan, {:name=>"Joan", :age=>18}], [:fred, {:name=>"Fred", :age=>23}],[:pete, {:name=>"Pete", :age=>54}]]?
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