HORIZON PROJECT

var baseIndexOf = require('./_baseIndexOf'),

    toInteger = require('./toInteger');

/* Built-in method references for those with the same name as other `lodash` methods. */

var nativeMax = Math.max;

/**

 * Gets the index at which the first occurrence of `value` is found in `array`

 * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)

 * for equality comparisons. If `fromIndex` is negative, it's used as the

 * offset from the end of `array`.

 *

 * @static

 * @memberOf _

 * @since 0.1.0

 * @category Array

 * @param {Array} array The array to inspect.

 * @param {*} value The value to search for.

 * @param {number} [fromIndex=0] The index to search from.

 * @returns {number} Returns the index of the matched value, else `-1`.

 * @example

 *

 * _.indexOf([1, 2, 1, 2], 2);

 * // => 1

 *

 * // Search from the `fromIndex`.

 * _.indexOf([1, 2, 1, 2], 2, 2);

 * // => 3

 */

function indexOf(array, value, fromIndex) {

  var length = array == null ? 0 : array.length;

  if (!length) {

    return -1;

  }

  var index = fromIndex == null ? 0 : toInteger(fromIndex);

  if (index < 0) {

    index = nativeMax(length + index, 0);

  }

  return baseIndexOf(array, value, index);

}

module.exports = indexOf;