The toString method converts the LinkedList object into a string. The following is the implementation of the toString method:
toString() { if (this.head == null) { // {1} return ''; } let objString = `${this.head.element}`; // {2} let current = this.head.next; // {3} for (let i = 1; i < this.size() && current != null; i++) { // {4} objString = `${objString},${current.element}`; current = current.next; } return objString; // {5}}
First, if the list is empty (head will be null or undefined), we return an empty string ({1}). We can also use if (this.isEmpty()) for this verification.
If the list is not empty, we will initialize the string that will be returned at the end of the method (objString) with the first element's value ...
