Javascript List ADT (Abstract Data Type)

list.js

function List() {
   this.listSize = 0;
   this.pos = 0;
   this.dataStore = []; // initializes an empty array to store list elements
   this.clear = clear;
   this.find = find;
   this.toString = toString;
   this.insert = insert;
   this.append = append;
   this.remove = remove;
   this.front = front;
   this.end = end;
   this.prev = prev;
   this.next = next;
   this.length = length;
   this.currPos = currPos;
   this.moveTo = moveTo;
   this.getElement = getElement;
   this.length = length;
   this.contains = contains;
   
   function append(element) {
      this.dataStore[this.listSize++] = element;
   }
    
   function find(element) {
       for (var i = 0; i < this.dataStore.length; ++i) {
          if (this.dataStore[i] == element) {
             return i;
          }
       }
       return -1;
    }
    
    function remove(element) {
       var foundAt = this.find(element);
       if (foundAt > -1) {
          this.dataStore.splice(foundAt,1);
          --this.listSize;
          return true;
       }
       return false;
    }
    
    function length() {
       return this.listSize;
    }
    
    function toString() {
        return this.dataStore;
    }
    
    function insert(element, after) {
       var insertPos = this.find(after);
       if (insertPos > -1) {
          this.dataStore.splice(insertPos+1, 0, element);
          ++this.listSize;
          return true;
       }
       return false;
    }
    
    function clear() {
       delete this.dataStore;
       this.dataStore = [];
       this.listSize = this.pos = 0;
    }
    
    function contains(element) {
       for (var i = 0; i < this.dataStore.length; ++i) {
          if (this.dataStore[i] == element) {
             return true;
          }
       }
       return false;
    }
    
    function front() {
       this.pos = 0;
    }
    
    function end() {
       this.pos = this.listSize-1;
    }
    
    function prev() {
       if (this.pos > 0) {
          --this.pos;
       }
    }
    
    function next() {
       if (this.pos < this.listSize-1) {
          ++this.pos;
       }
    }
    
    function currPos() {
       return this.pos;
    }
    
    function moveTo(position) {
       this.pos = position;
    }
    
    function getElement() {
       return this.dataStore[this.pos];
    }
   
}

var names = new List();
names.append("Brittney");
names.append("Christopher");
names.append("Donald");
names.append("Shayna");
names.append("Paul");
names.append("Amy");
names.append("Colin");


names.end();
console.log(names.getElement());