code: function (array, searchElement) {
      for (var i = 0, len = array.length; i < len; i++) {
        if (array[i] === searchElement) {
          return i;
        }
      }
      return -1;
    }
docs: @name indexOf
  @private
  
  @description
  indexOf polyfill. Kinda sorta.
  
  @param {array} array Array to search in.
  @param {string} searchElement Element to search for.
  
  @returns {int} Index of search element.