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Transfer array of objects to array of only one attribute in ruby

I am trying to Transfer array of objects to array of only one attribute in ruby. example - I have something like this :

arr = [       
 {
   name: hihihihi,
   phone: null,
   email: [email protected],
   position: null
 },
 {
   name: hi,
   phone: null,
   email: [email protected],
   position: null
 }
]

and i want the output to be:

["[email protected]","[email protected]"]

(to make an array (with apostrophe) just form the email attribute)

Thank you

I would like to find out the most efficient way to do so

Solution

  • This is very straightforward with #map once we correct your syntax in defining arr a bit.

    arr = [       
 {
   name: 'hihihihi',
   phone: 'null',
   email: '[email protected]',
   position: 'null'
 },
 {
   name: 'hi',
   phone: 'null',
   email: '[email protected]',
   position: 'null'
 }
]

arr.map { |h| h[:email] }