I have a Hash which is of the form
{:a => {"aa" => 11,"ab" => 12}, :b => {"ba" => 21,"bb" => 22}}
如何将其改为<代码>{:a => [[a”,11],[“ab”,12],:b=>[“ba”,21],[“bb”,22]}
If you want to modify the original hash you can do:
hash.each_pair { |key, value| hash[key] = value.to_a }
http://www.ruby-doc.org/french/states/Hash.html#method-i-to_a”rel=“noreferer” Hash#to_a
Converts hsh to a nested array of [ key, value ] arrays.
h ={“c” => 300, “a” => 100,“d” => 400,“c” => 300 }
hto_a 注
这样做的另一个途径是:
hsh = {:a => {"aa" => 11,"ab" => 12}, :b => {"ba" => 21,"bb" => 22}}
hsh.each{|k,v| hsh[k]=*v}
# => {:a=>[["aa", 11], ["ab", 12]], :b=>[["ba", 21], ["bb", 22]]}
hash.collect {|a, b| [a, hash[a].collect {|c,d| [c,d]}] }.collect {|e,f| [e => f]}
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