npm install bowling 

npm test 

var bowl = require('bowling') var aCompleteGame = ['81','9-','9/','71','9-','X','90','70','x','7-'], result result = bowl(aCompleteGame) console.log(result) /* [ {outcome: '81', cumulative: 9, score: 9}, {outcome: '9-', cumulative: 18, score: 9}, {outcome: '9/', cumulative: 35, score: 17}, {outcome: '71', cumulative: 43, score: 8}, {outcome: '9-', cumulative: 52, score: 9}, {outcome: 'X', cumulative: 71, score: 19}, {outcome: '9-', cumulative: 80, score: 9}, {outcome: '7-', cumulative: 87, score: 7}, {outcome: 'X', cumulative: 104, score: 17}, {outcome: '7-', cumulative: 111, score: 7} ] */