Use `apply` as a "map()" equivalent

[jmooring]

This is a map. Think about it.

{
   "a": [
      {
         "age": 30,
         "name": "Alice"
      },
      {
         "age": 25,
         "name": "Bob"
      },
      {
         "age": 35,
         "name": "Charlie"
      }
   ],
   "b": {
      "bar": [
         true,
         "x",
         21
      ],
      "foo": [
         6,
         7,
         42
      ]
   },
   "c": true,
   "d": {
      "Date": "2023-01-01T00:00:00Z",
      "Aliases": [],
      "BundleType": "",
      "Draft": false,
      "Keywords": null,
      "Sitemap": {
         "ChangeFreq": "",
         "Priority": -1,
         "Filename": "sitemap.xml",
         "Disable": false
      },
      "Weight": 0
   }
}