Question

I’m getting a multidimensional array with a bunch of key-value hashes inside of it, just like that:

[{"key1"=>"value", "key2"=>[value, value]}, {"key1"=>"value", "key2"=>[value, value]}, {"key1"=>"value", "key2"=>[value, value]}, {"key1"=>"value", "key2"=>[value, value]}]

What I need, is to get all the key1 values from this array and just couldn’t figure how to perform it. Any suggestion would help, thank you.

Answer 1

  arr = [{"key1"=>"value", "key2"=>[value, value]}, 
    {"key1"=>"value", "key2"=>[value, value]}, 
    {"key1"=>"value", "key2"=>[value, value]},
    {"key1"=>"value", "key2"=>[value, value]}]

  key1s = arr.map{|h|h["key1"]}