var baseSortedIndex = require('./_baseSortedIndex'),

eq = require('./eq');

/**

* This method is like `_.indexOf` except that it performs a binary
* search on a sorted `array`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Array
* @param {Array} array The array to inspect.
* @param {*} value The value to search for.
* @returns {number} Returns the index of the matched value, else `-1`.
* @example
*
* _.sortedIndexOf([4, 5, 5, 5, 6], 5);
* // => 1
*/

function sortedIndexOf(array, value) {

var length = array == null ? 0 : array.length;
if (length) {
  var index = baseSortedIndex(array, value);
  if (index < length && eq(array[index], value)) {
    return index;
  }
}
return -1;

}

module.exports = sortedIndexOf;