differenceWith.js
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differenceWith.js
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			var baseDifference = require('./_baseDifference'),
			baseFlatten = require('./_baseFlatten'),
			baseRest = require('./_baseRest'),
			isArrayLikeObject = require('./isArrayLikeObject'),
			last = require('./last');

			/**
			* This method is like `_.difference` except that it accepts `comparator`
			* which is invoked to compare elements of `array` to `values`. The order and
			* references of result values are determined by the first array. The comparator
			* is invoked with two arguments: (arrVal, othVal).
			*
			* Note: Unlike `_.pullAllWith`, this method returns a new array.
			*
			* @static
			* @memberOf _
			* @since 4.0.0
			* @category Array
			* @param {Array} array The array to inspect.
			* @param {...Array} [values] The values to exclude.
			* @param {Function} [comparator] The comparator invoked per element.
			* @returns {Array} Returns the new array of filtered values.
			* @example
			*
			* var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
			*
			* _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
			* // => [{ 'x': 2, 'y': 1 }]
			*/
			var differenceWith = baseRest(function(array, values) {
			var comparator = last(values);
			if (isArrayLikeObject(comparator)) {
			comparator = undefined;
			}
			return isArrayLikeObject(array)
			? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
			: [];
			});

			module.exports = differenceWith;