How to convert to String a elements of each object from an array?

I have an array of object, like this:

[
    {
        "ID": "771276",       
        "Name": "John",        
        "Subject": [
            {
                "Name": "Subject 1"
            },
            {
                "Name": "Subject 2"
            }
        ]
    },
        {
        "ID": "771277",       
        "Name": "Mary",        
        "Subject": [
            {
                "Name": "Subject 80"
            }
        ]
    },
    .....   
]

How can I convert Subject element from each object to a String with elements separated by comma?

Getting the first object as example, I hope the result:

{
    "ID": "771276",       
    "Name": "John",        
    "Subject": "Subject 1, Subject 2"
}

>Solution :

You can make this happen with the help of map and join functions in javascript.

Below is code snippet.

const tryObj = [{
    "ID": "771276",
    "Name": "John",
    "Subject": [{
        "Name": "Subject 1"
      },
      {
        "Name": "Subject 2"
      }
    ]
  },
  {
    "ID": "771277",
    "Name": "Mary",
    "Subject": [{
      "Name": "Subject 80"
    }]
  },
]
const check = tryObj.map(({
  ID,
  Name,
  Subject
}) => ({
  ID,
  Name,
  Subject: Subject.map(sub => sub.Name).join(', ')
}))
console.log("all together", check);