code: function makeUnique (a) {
                      if(!(a instanceof Array)) return a;
  
                      var visited = [];
                      for(var i = 0; i < a.length; i++) {
                          if(visited.indexOf(a[i]) === -1) {
                              visited.push(a[i]);
                          }
                          else {
                              a.splice(i, 1);
                              i--; // Splice will affect the internal array pointer, so fix it...
                          }
                      }
                      return a;
                  }
docs: Removes duplicates from the current array.
  This is a destructive action, and will modify the array in place.
  @param {Array} a The Array object to operate on.
  @returns {Array<*>} The current array, with duplicates removed.
  @function