text: var isSymbol = require('./isSymbol');
  
  /**
   * The base implementation of methods like `_.max` and `_.min` which accepts a
   * `comparator` to determine the extremum value.
   *
   * @private
   * @param {Array} array The array to iterate over.
   * @param {Function} iteratee The iteratee invoked per iteration.
   * @param {Function} comparator The comparator used to compare values.
   * @returns {*} Returns the extremum value.
   */
  function baseExtremum(array, iteratee, comparator) {
    var index = -1,
        length = array.length;
  
    while (++index < length) {
      var value = array[index],
          current = iteratee(value);
  
      if (current != null && (computed === undefined
            ? (current === current && !isSymbol(current))
            : comparator(current, computed)
          )) {
        var computed = current,
            result = value;
      }
    }
    return result;
  }
  
  module.exports = baseExtremum;
  