function baseFindIndex(array, predicate, fromIndex, fromRight) {
    var length = array.length,
        index = fromIndex + (fromRight ? 1 : -1);

    while ((fromRight ? index-- : ++index < length)) {
      if (predicate(array[index], index, array)) {
        return index;
      }
    }
    return -1;
  }
The base implementation of `_.findIndex` and `_.findLastIndex` without
support for iteratee shorthands.

@private
@param {Array} array The array to search.
@param {Function} predicate The function invoked per iteration.
@param {number} fromIndex The index to search from.
@param {boolean} [fromRight] Specify iterating from right to left.
@returns {number} Returns the index of the matched value, else `-1`.