1  var baseIndexOf = require('./_baseIndexOf'),
 2      toInteger = require('./toInteger');
 3  
 4  /* Built-in method references for those with the same name as other `lodash` methods. */
 5  var nativeMax = Math.max;
 6  
 7  /**
 8   * Gets the index at which the first occurrence of `value` is found in `array`
 9   * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
10   * for equality comparisons. If `fromIndex` is negative, it's used as the
11   * offset from the end of `array`.
12   *
13   * @static
14   * @memberOf _
15   * @since 0.1.0
16   * @category Array
17   * @param {Array} array The array to inspect.
18   * @param {*} value The value to search for.
19   * @param {number} [fromIndex=0] The index to search from.
20   * @returns {number} Returns the index of the matched value, else `-1`.
21   * @example
22   *
23   * _.indexOf([1, 2, 1, 2], 2);
24   * // => 1
25   *
26   * // Search from the `fromIndex`.
27   * _.indexOf([1, 2, 1, 2], 2, 2);
28   * // => 3
29   */
30  function indexOf(array, value, fromIndex) {
31    var length = array == null ? 0 : array.length;
32    if (!length) {
33      return -1;
34    }
35    var index = fromIndex == null ? 0 : toInteger(fromIndex);
36    if (index < 0) {
37      index = nativeMax(length + index, 0);
38    }
39    return baseIndexOf(array, value, index);
40  }
41  
42  module.exports = indexOf;