Ruby or Rails array iteration syntax -

i came across way in program extracted name property of object , found syntax little peculiar. dealing results of json response.

our json response following =

[{"id"=>9, "name"=>"baked potato w/ cheese", "instructions"=>nil},  {"id"=>12, "name"=>"baked brussel sprouts", "instructions"=>nil}]  results = json.parse(response.body)  def extract_name   ->(object) { object["name"] } end  results.map(&extract_name) 

so understand results.map(&extract_name) returns name of json objects, don't understand how.

i'm unfamiliar ->(object) { object["name"] } syntax. there other shorthand ways of doing may me better idea of type of syntax?

the arrow -> short syntax create lambas. see "what call -> operator in ruby?".

an alternative way following snippet:

results.map { |object| object["name"] }