singleLinkedList.ts

var data = {
        value: 123,
        next: {
            value: 321,
            next: {
                value: 348,
                next: {
                    value: 981,
                    next: {
                        value: 712,
                        next: {
                            value: 331   
                        }   
                    }   
                }   
            }    
        }
    };


function objToArray(obj: object): any[] {
  const result = [];
  
  let current = obj;
  
  while (current) {
    result.push(current.value);
    current = current.next;
  }
  
  return result;
}

console.log(objToArray(data));