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[yaffs-website] / node_modules / grunt-uncss / node_modules / lodash / intersectionWith.js

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+var arrayMap = require('./_arrayMap'),
+    baseIntersection = require('./_baseIntersection'),
+    baseRest = require('./_baseRest'),
+    castArrayLikeObject = require('./_castArrayLikeObject'),
+    last = require('./last');
+
+/**
+ * This method is like `_.intersection` except that it accepts `comparator`
+ * which is invoked to compare elements of `arrays`. The order and references
+ * of result values are determined by the first array. The comparator is
+ * invoked with two arguments: (arrVal, othVal).
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @param {Function} [comparator] The comparator invoked per element.
+ * @returns {Array} Returns the new array of intersecting values.
+ * @example
+ *
+ * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+ * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+ *
+ * _.intersectionWith(objects, others, _.isEqual);
+ * // => [{ 'x': 1, 'y': 2 }]
+ */
+var intersectionWith = baseRest(function(arrays) {
+  var comparator = last(arrays),
+      mapped = arrayMap(arrays, castArrayLikeObject);
+
+  comparator = typeof comparator == 'function' ? comparator : undefined;
+  if (comparator) {
+    mapped.pop();
+  }
+  return (mapped.length && mapped[0] === arrays[0])
+    ? baseIntersection(mapped, undefined, comparator)
+    : [];
+});
+
+module.exports = intersectionWith;