Combine an array of objects and their properties. Remove object after combining

Question

I need to merge the objects together. The resource property is what determines if the objects can be merged. To determine where the hours property valu

Answer 1

It gets pretty tricky when you remove items from an array while iterating over it.

I've rewritten your solution in a more functional way here: http://codepen.io/tinacious/pen/gLXJow?editors=1011

var members = [
  {billable: true, hours: 15, name: "Joe Smith", resource: "00530000003mgYGAAY", totalBillableHours: 0, totalHours: 0, totalNonBillableHours: 0},
  {billable: true, hours: 5, name: "Joe Smith", resource: "00530000003mgYGAAY", totalBillableHours: 0, totalHours: 0, totalNonBillableHours: 0},
  {billable: false, hours: 5, name: "Joe Smith", resource: "00530000003mgYGAAY", totalBillableHours: 0, totalHours: 0, totalNonBillableHours: 0},
  {billable: false, hours: 5, name: "Jan Smith", resource: "00530000003mgYTAAY", totalBillableHours: 0, totalHours: 0, totalNonBillableHours: 0},
  {billable: true, hours: 12, name: "Jan Smith", resource: "00530000003mgYTAAY", totalBillableHours: 0, totalHours: 0, totalNonBillableHours: 0},
  {billable: true, hours: 2, name: "Jam Smith", resource: "00530000003mgYTAAY", totalBillableHours: 0, totalHours: 0, totalNonBillableHours: 0}  
];

function combineMembers(members) {
  var combinedMembers = {};

  members.forEach(function (member) {
    var resourceId = member.resource;
    var typeOfHour = member.billable ? 'totalBillableHours' : 'totalNonBillableHours';

    if (!combinedMembers[resourceId]) {
      combinedMembers[resourceId] = Object.assign({}, member);
    }

    combinedMembers[resourceId][typeOfHour] += member.hours;      
    combinedMembers[resourceId].totalHours += member.hours;
  });

  return Object.keys(combinedMembers).map(function (resourceId) {
    return combinedMembers[resourceId];
  });
}

console.log(combineMembers(members));

The resulting output is what you are looking for:

Array[2]
    0 : Object
        billable : true
        hours : 15
        name : "Joe Smith"
        resource : "00530000003mgYGAAY"
        totalBillableHours : 20
        totalHours : 25
        totalNonBillableHours : 5
        __proto__ : Object
    1 : Object
        billable : false
        hours : 5
        name : "Jan Smith"
        resource : "00530000003mgYTAAY"
        totalBillableHours : 14
        totalHours : 19
        totalNonBillableHours : 5
        __proto__ : Object
    length : 2
    __proto__ : Array[0]