mongoose push multiple items to array code example

Example 1: mongodb push to arry in update

db.collection.update({_id:xx}, {$push:{letters : {$each:['first one'], $position:0}}})

Example 2: mongodb push to arry in update

db.collection.update({_id:xx}, {$pop:{letters : -1}})

Example 3: mongoose update array push multiple

Kitten.update(
  { name: 'fluffy'},
  {
    $push: {
      values: {
        $each: [2, 3]
      }
    }
  }
)
  .then(result => {
  	console.log(result)
  })
  .catch(err => {
    console.error(err)
  })