Convert reduce function to work with IE

Question

Alright, so I had some help a couple months ago with coming up with a solution to keep count of the elements in an array: Loop through multiple array and keep count of each

Answer 1

Remove the de-structuring.

cur.ProductHandlingTypes.map((obj) => obj.Name).forEach(...

Answer 2

IE 11 doesn't support arrow functions [1], nor destructuring [2], so convert it to ES5 syntax:

var b = data.reduce(function(acc, cur) {
  cur.ProductHandlingTypes
    .map(function(obj) {
      return obj.Name
    })
    .forEach(function(n) {
      return acc[n] = (acc[n] || 0) + 1
    })

  return acc
}, {});

[1] http://caniuse.com/#feat=arrow-functions

[2] http://kangax.github.io/compat-table/es6/#test-destructuring