text: var arrayExtremum = require('./arrayExtremum'),
      baseCallback = require('./baseCallback'),
      baseExtremum = require('./baseExtremum'),
      isArray = require('../lang/isArray'),
      isIterateeCall = require('./isIterateeCall'),
      toIterable = require('./toIterable');
  
  /**
   * Creates a `_.max` or `_.min` function.
   *
   * @private
   * @param {Function} comparator The function used to compare values.
   * @param {*} exValue The initial extremum value.
   * @returns {Function} Returns the new extremum function.
   */
  function createExtremum(comparator, exValue) {
      return function(collection, iteratee, thisArg) {
          if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
              iteratee = undefined;
          }
  
          iteratee = baseCallback(iteratee, thisArg, 3);
  
          if (iteratee.length == 1) {
              collection = isArray(collection) ? collection : toIterable(collection);
              var result = arrayExtremum(collection, iteratee, comparator, exValue);
  
              if (!(collection.length && result === exValue)) {
                  return result;
              }
          }
  
          return baseExtremum(collection, iteratee, comparator, exValue);
      };
  }
  
  module.exports = createExtremum;
  