var array1 = [
  {
    id: 1,
    value: 'value',
    children: ["string1", "string2","string3"]
  },
  {
    id: 'child2',
    value: 'value',
    children: ["string1","string9"]
  }
]

var array2 = [
  {
    id: 1,
    value: 'value',
    children: ["string1", "string2","string"]
  },
  {
    id: 'child2',
    value: 'value',
    children: ["string2","string8"]
  }
]

How to use .filter and .some to find number of duplicates? AND How to use Lodash?