title: Insert a new object to array Ramda
body: <p>Ramda has <a href="https://ramdajs.com/0.22.1/docs/#insert" rel="nofollow noreferrer">insert function</a>. But in my case I dunno how to drill through object and insert a new object to array. Also a new object should be on the last index of array, we can get it via <code>stuff["31"].length</code>. My attempts were too pathetic so I decided not to show them :/</p>
  
  <p><strong>Data model:</strong></p>
  
  <pre><code>const stuff = {
    "31": [
      {
        "id": "11",
        "title": "ramda heeeelp"
      },
      {
        "id": "12",
        "title": "ramda 123"
      },
      //HERE I WANT TO INSERT A NEW OBJECT - {id: "13", title: "new title"}
    ],
    "33": [
      {
        "id": "3",
        "title": "..."
      }
    ],
    "4321": [
      {
        "id": "1",
        "title": "hello world"
      }
    ]
  }
  </code></pre>