Just use .flatMap and Object.values

const data = [{a:23}, {b:23}, {r:2323}, {e:99}];

const result = data.flatMap(Object.values);

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0 }

let array = [ { a: 23 }, { b: 23 }, { r: 2323 }, { e: 99 } ]
let array1 = []

for (const obj of array) {
  array1.push(obj[Object.keys(obj)[0]])
}

console.log(array1) // [23, 23, 2323, 99]

• obj[Object.keys(obj)[0]] returns the first property of the object obj (source)