Javascript object array to string

Question

Assuming I have an object array:

array=[
  {
    "Item": "A"
    "Quantity" : 2
  },
  {
    "Item": "B"
    "Quantity" : 7
  },
  {
    "Item": "C"
    "Quantity" : 1
  }
]

I am wondering what would be my options to get the following string output :

(A, 2), (B, 7), (C,1)

Answer 1

You could map the Object.values and join like this:

• Loop through the array using map
• Object.values(a) returns an array like this: ["A", 2]
• join them using and wrap a () around using template literals
• join the resulting string array from map using another join

const array = [
  {
    "Item": "A",
    "Quantity" : 2
  },
  {
    "Item": "B",
    "Quantity" : 7
  },
  {
    "Item": "C",
    "Quantity" : 1
  }
]

const str = array.map(a => `(${ Object.values(a).join(", ") })`)
                 .join(", ")
                 
console.log(str)

If you're okay with (A,2), (B,7), (C,1) without a space in between them, you could simply use

const array=[{"Item":"A","Quantity":2},{"Item":"B","Quantity":7},{"Item":"C","Quantity":1}]

const str = array.map(a => `(${ Object.values(a) })`).join(", ")
console.log(str)

Answer 2

This is not the most elegant way to do this but it's easy to understand:

array = [{
    "Item": "A",
    "Quantity": 2
  },
  {
    "Item": "B",
    "Quantity": 7
  },
  {
    "Item": "C",
    "Quantity": 1
  }
];

var str = "";
for (var a = 0; a < array.length; a++) {
  str += "(";
  str += array[a].Item + ",";
  str += array[a].Quantity + ")";
  if (a != array.length - 1) {
    str += ",";
  }
}
console.log(str);