List ADT

list.js

function List(){
  this.listSize =  0;
  this.pos = 0;
  this.data = [];
}

List.prototype = {
  
  toString : function(){
    return this.data.toString();
  },
  getElement : function(){
    return this.data[this.pos];
  },
  clear : function(){
    this.data = [];
  },
  insert : function(element, i){
    this.data.splice(i,0, element);
  },
  add : function(element){
    this.data.push(element);
    this.listSize = this.data.length;
  },
  remove : function(){
    this.data.splice(this.pos, 1);
    this.listSize = this.data.length;
  },
  next : function(){
              this.pos = (this.data.length - 1) === this.pos ?  this.pos : this.pos + 1;
    return this.pos;
  },
  prev : function(){
    this.pos = this.pos === 0 ?  this.pos : this.pos - 1;
    return this.pos;
  },
  moveTo : function(n){
    if(n < this.data.length && n !== 0){
    this.pos = n;      
    }else{
      throw "Scandal at";
    }
    return this.pos;
  },
  currPos : function(){
    return this.pos;
  },
  front : function(){
    this.pos = 0;
  },
  end : function(){
    this.pos = this.data.length - 1;
  }
     
};