n00b question about map

n00b question about map

I have a JSON array that looks like this:

[
      {"concept_name":"Blah","concept_id":"1234"},
      {"concept_name":"blah2","concept_id":4231"},
      ...
]

and I am trying to write a $.map to parse this as a part of an autocomplete. In this case the JSON array is inside "data"

response($.map(data, function (value, key) {
return {
   label: concept_name,
   value: concept_id
};
   }

And am getting an error "Uncaught ReferenceError: concept_name is not defined "

I am a super newbie with JS so I am thinking I need an each() somewhere here. 

Any help appreciated!