map a property from array of objects javascript

1var result = objArray.map(function(a) {return a.foo;});

1//Getting One Value from an Array of Items or sum of array
2var numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12];
3var total = numbers.reduce(function(total, current) {
4    return total + current;
5}, 0);
6
7console.log(total);