Untitled

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>

<script id="jsbin-javascript">
function unique( array ){
  var len_arr=array.length;
  var i = 0;
  var metNum;
  var result=[];

  if (len_arr >0){
    while (i < (len_arr-1)) {

      if(array[i] != array[i+1] && array[i] != metNum){

        result.push(array[i]);
      }
      else if(array[i] == array[i+1]){

        metNum = array[i];
      }

      i=i+1;
    }

    if (result[result.length-1] != array[len_arr-1]){
      result.push(array[len_arr-1]);
    }

    return result;
  }
  else{
//     console.log("Empty array");
    return false;
  }
}

var v = [1, 2, 2, 2, 3, 4, 5, 5, 5, 6, 7, 7, 8];
var w = unique(v);
console.log(w);

var v = [];
var w = unique(v);
console.log(w);

var v = [1];
var w = unique(v);
console.log(w);

var v = [2,2,2,4,4,4,6,6,6];
var w = unique(v);
console.log(w);

var v = [1,2,3,4,5,6];
var w = unique(v);
console.log(w);
</script>


<script id="jsbin-source-javascript" type="text/javascript">function unique( array ){
  var len_arr=array.length;
  var i = 0;
  var metNum;
  var result=[];

  if (len_arr >0){
    while (i < (len_arr-1)) {

      if(array[i] != array[i+1] && array[i] != metNum){

        result.push(array[i]);
      }
      else if(array[i] == array[i+1]){

        metNum = array[i];
      }

      i=i+1;
    }

    if (result[result.length-1] != array[len_arr-1]){
      result.push(array[len_arr-1]);
    }

    return result;
  }
  else{
//     console.log("Empty array");
    return false;
  }
}

var v = [1, 2, 2, 2, 3, 4, 5, 5, 5, 6, 7, 7, 8];
var w = unique(v);
console.log(w);

var v = [];
var w = unique(v);
console.log(w);

var v = [1];
var w = unique(v);
console.log(w);

var v = [2,2,2,4,4,4,6,6,6];
var w = unique(v);
console.log(w);

var v = [1,2,3,4,5,6];
var w = unique(v);
console.log(w);</script></body>
</html>