Most Rubyish Way To Get An Array Containing Specific Values From An Array Of Objects?

Question

I have an array of ruby objects that looks something like this:

[#<email: "someemail" other_properties: "SDFDF">, #<...>, #<...>]

Each of the objects in the array has an email property. I want to get a new array of all the email properties of the ruby objects in the array.

After executing the code, I would have an array that looked like this:

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

I am newer to ruby and want to do this in the most rubyish way possible.

My question is, what's the best way to do this in ruby?

Brian Campbell · Accepted Answer · 2011-04-18 20:22:35Z

16

You can use the map method to apply a block to each element of the array, returning a new array containing the results of each invocation:

somearray.map {|x| x.email}

answered Apr 18, 2011 at 20:22

Brian Campbell

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2 Comments

Thank you! This exactly what I was after. I will accept as soon as SO lets me. :)

In Ruby 1.87+ you can simplify this as somearray.map(&:email)