code: function contains(arr, v) {
      var nIndex,
        nLen = arr.length;
      for (nIndex = 0; nIndex < nLen; nIndex++) {
        if (arr[nIndex][1] === v) {
          return true;
        }
      }
      return false;
    }
docs: Checks if the value exist in the array.
  @param arr
  @param v
  @returns {boolean}