[
  {
    "_type": "Contact",
    "displayName": "Joe Smith",
    "name": {
      "firstName": "joe",
      "lastName": "smith"
    }
  },
  {
    "_type": "Contact",
    "displayName": "Nancy Doe",
    "name": {
      "firstName": "nancy",
      "lastName": "doe"
    }
  },
  {
    "_type": "Contact",
    "displayName": "Nancy Doe",
    "name": {
      "firstName": "joe",
      "lastName": "harrison"
    }
  },
  {
    "_type": "Contact",
    "displayName": "Nancy Doe",
    "name": {
      "firstName": "nancy",
      "lastName": "williams"
    }
  },
  {
    "_type": "Contact",
    "displayName": "Nancy Doe",
    "name": {
      "firstName": "doug",
      "lastName": "johnson"
    }
  },
  {
    "_type": "_schemaType",
    "name": "NameCount",
    "schema": {
      "type": "object",
      "extends": "View"
    }
  },
  {
    "_type": "Reduce",
    "targetType": "NameCount",
    "sourceType": "Contact",
    "sourceKeyName": "name.firstName",
    "add": "function add (k, z, c) { if (!z) { z = { count: 0 } }; z.count += 1; return z;}",
    "subtract": "function subtract (k, z, c) { if (!z) {z = {count: 0}}; z.count -= 1; if (z.count) return z;}"
  }
]