Array - remove duplicate items.

removeDuplicate.js

function removeDuplicate(oldArray) {

    var newArray = [];

    var i = 0;
    var len = oldArray.length;

    for(; i < len; i++) {
       if(newArr.indexOf(arr[i])<0) {
         newArr.push(arr[i])
       }
    }

    return newArray;

}