function baseIndexOf(array, value, fromIndex) {
    if (value !== value) {
      return indexOfNaN(array, fromIndex);
    }
    var index = fromIndex - 1,
        length = array.length;

    while (++index < length) {
      if (array[index] === value) {
        return index;
      }
    }
    return -1;
  }
The base implementation of `_.indexOf` without `fromIndex` bounds checks.

@private
@param {Array} array The array to search.
@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`.