The isEmpty and size methods are the same as the ones we implemented for the classes we created in previous chapters. Let's take a look at them anyway:
size() { return this.count;}
The size method returns the number of elements of the list. Unlike the classes we implemented in earlier chapters, the length variable of the list is controlled internally, since LinkedList is a class built from scratch.
The isEmpty method returns true if there is no element in the list, and false otherwise. Its code is presented as follows:
isEmpty() { return this.size() === 0;}
And finally, we have the getHead method:
getHead() { return this.head;}
The head variable is a private variable from the LinkedList class (as we ...
