Ruby get object keys as array

Question

I am new to Ruby  if I have an object like this     apple    gt   fruit    carrot    gt   vegetable     How can I return an array of just the keys     apple    carrot

User · Accepted Answer

hash     apple    gt   fruit    carrot    gt   vegetable   array   hash keys      gt    apple    carrot     it s that simple

User · Answer

Use the keys method    apple    gt   fruit    carrot    gt   vegetable   keys      apple    carrot

User · Answer

An alternative way if you need something more  besides using the keys method    hash     apple    gt   fruit    carrot    gt   vegetable   array   hash collect   key value  key     obviously you would only do that if you want to manipulate the array while retrieving it

User · Answer

Like taro said  keys returns the array of keys of your Hash   http   ruby-doc org core-1 9 3 Hash html method-i-keys  You ll find all the different methods available for each class   If you don t know what you re dealing with    puts my unknown variable class to s   This will output the class name

[ruby] Ruby get object keys as array

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