Function indexOf

lib/web/jshint.js:6511–6528

* Gets the index at which the first occurrence of `value` is found in `array` * using `SameValueZero` for equality comparisons. If `fromIndex` is negative, * it is used as the offset from the end of `array`. If `array` is sorted * providing `true` for `fromIndex` performs a faster bin

(array, value, fromIndex)

     * // => 2
     */
    function indexOf(array, value, fromIndex) {
      var length = array ? array.length : 0;
      if (!length) {
        return -1;
      }
      if (typeof fromIndex == 'number') {
        fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex;
      } else if (fromIndex) {
        var index = binaryIndex(array, value),
            other = array[index];

        if (value === value ? (value === other) : (other !== other)) {
          return index;
        }
        return -1;
      }
      return baseIndexOf(array, value, fromIndex || 0);
    }

    /**
     * Gets all but the last element of `array`.