var people = [ {firstName : \"Thein\", city : \"ny\", qty : 5}, {firstName : \"Michael\", city : \"ny\", qty : 3}, {firstName : \"Bloom\", city : \"nj\", qty
We don't have to use pluck, omit do the trick as well.
var result = _.map(people, function(person) { return _.omit(person, 'city'); });