mongodb delete item from array code example

Example 1: how to delete subdocument array object mongodb

db.getCollection('profilesservices').updateOne({_id: ObjectId("60391a9eefdb7c17bd84c0b1")},
  {
   $pull: { "volunteerExperiences": {_id: ObjectId("60392e7595bb2d87689aca62")} } 
  }
)

Example 2: Mongodb Remove array element by index

db.example.update({}, [
     {$set: {field: {
           $concatArrays: [ 
                  {$slice: ["$field", P]}, 
                  {$slice: ["$field", {$add: [1, P]}, {$size: "$field"}]}
           ]
     }}}
]);