_baseExtremum.js
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_baseExtremum.js
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			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;