JAVASCRIPT

Add property to all objects in array

var array = [ {'a': '12', 'b':'10'}, {'a': '20', 'b':'22'} ];

var r = array.map( x => {
  x.c = true;
  return x
  })

console.log(r)
 Run code snippet
 //[ { a: '12', b: '10', c: true }, { a: '20', b: '22', c: true } ]

nodejs add new property array object

const data = [{ name: 'dendi', age: 23 }, { name: 'dhani' }]
const result = data.filter((v, i) => {
	if (!Object.keys(v).includes('age')) {
		Object.defineProperty(v, 'age', {
			value: 25,
			writeable: true,
			enumerable: true
		})
	}
	return v
})