insert_and_update.js

> db.alphabet.insert({
      "_id": "00000", 
      "array": ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']
  })
// We missed the 'i'!
// Let's add it in the position before the last element.
> db.alphabet.update(
      { "_id": "00000" },
      {
          $push: {
              array: 'i'
          }
      }
  )
// Check the results:
> db.alphabet.find({ "_id": "00000" })
{ array : [ "a", "b", "c", "d", "e", "f", "g", "h", "i" ] }