sum values in array of objects

javascript/reduce.js

@@ -1,5 +1,11 @@
-module.exports.sum = (arr) => {
+module.exports.sum = arr => {
 	return arr.reduce((accumulator, currentValue) => {
 		return accumulator + currentValue
 	}, 0)
+}
+
+module.exports.sumObj = arr => {
+	return arr.reduce((accumulator, currentValue) => {
+		return accumulator + Object.values(currentValue)[0]
+	}, 0)
 }

javascript/reduce.test.js

@@ -3,4 +3,9 @@ const reduce = require('./reduce')
 test('sum array values', () => {
   expect(reduce.sum([1,2,3])).toBe(6)
   expect(reduce.sum([])).toBe(0)
+})
+
+test('sum object array', () => {
+  expect(reduce.sumObj([{x:1}, {y:2}, {z:3}])).toBe(6)
+  expect(reduce.sumObj([])).toBe(0)
 })