How can I “extract” values from a multidimensional array in a smart way?

Question

I am using Ruby on Rails 3.2.2 and Ruby 1.9.2.

Given the following multidimensional Array:

[[\"value1\", \"value1_other\"], [\"value2\",         


        

Answer 1

>> array = [["value1", "value1_other"], ["value2", "value2_other"], ["value3", "value3_other"]]
=> [["value1", "value1_other"], ["value2", "value2_other"], ["value3", "value3_other"]]
>> array.map { |v| v[0] }
=> ["value1", "value2", "value3"]