Remove duplicate item from array Javascript [duplicate]

Answer 1

      arr3 = [1, 2, 3, 2, 4, 5];

      unique = [];

   function findUnique(val)
  {
   status = '0';
   unique.forEach(function(itm){

      if(itm==val)
      { 
      status=1;
      }

              })
 return status;
 }

 arr3.forEach(function(itm){

  rtn =  findUnique(itm);
  if(rtn==0)
  unique.push(itm);


  });

  console.log(unique);  // [1, 2, 3, 4, 5]