In the array version, we do not need to worry about a toString method because the data structure will use the one already provided by the array. For this object version, we will create a toString method so we can print the content of the stack similar to an array:
toString() { if (this.isEmpty()) { return ''; } let objString = `${this.items[0]}`; // {1} for (let i = 1; i < this.count; i++) { // {2} objString = `${objString},${this.items[i]}`; // {3} } return objString;}
If the stack is empty, we simply return an empty string. If it is not empty, we will initialize the string with the first element, from the base of the stack ({1}). Then, we will iterate through all the keys of the stack ({2}) until its top, adding ...
