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I have the following array where I want to select each of the keys:

names = [
 {"Ánias"=>{:gender=>"male", :nationality=>"faroese"}},
 {"Annfinnur"=>{:gender=>"male", :nationality=>"faroese"}},
 {"Ansgar"=>{:gender=>"male", :nationality=>"faroese"}}
]

How would I go about selecting all the names ("Ánias", "Annfinnur", "Ansgar")?

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  • 1
    Do those hashes have always one key/value? (in that case it makes no sense to use a hash). Commented Mar 22, 2014 at 21:41

1 Answer 1

Reset to default
2

Just do

names = [
          {"Ánias"=>{:gender=>"male", :nationality=>"faroese"}},
          {"Annfinnur"=>{:gender=>"male", :nationality=>"faroese"}},
          {"Ansgar"=>{:gender=>"male", :nationality=>"faroese"}}
        ]

names.map { |h| h.keys.first }
# => ["Ánias", "Annfinnur", "Ansgar"]
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