List.js

function List() {
   this.listSize = 0;
   this.pos = 0;
   this.dataStore = [];
   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.currPos = currPos;
   this.moveTo = moveTo;
   this.getElement = getElement;
//   this.length = length;
}

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 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.length = 0;
    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("Cynthia");
names.append("Raymond");
names.append("Barbara");
names.toString();

names.remove("Raymond");
names.toString();