function strictIndexOf(array, value, fromIndex) {
  var index = fromIndex - 1,
      length = array.length;

  while (++index < length) {
    if (array[index] === value) {
      return index;
    }
  }

  return -1;
}
A specialized version of `_.indexOf` which performs strict equality
comparisons of values, i.e. `===`.

@private
@param {Array} array The array to inspect.
@param {*} value The value to search for.
@param {number} fromIndex The index to search from.
@returns {number} Returns the index of the matched value, else `-1`.