1 files changed, 42 insertions, 0 deletions
diff --git a/tools/eslint/node_modules/lodash/intersectionBy.js b/tools/eslint/node_modules/lodash/intersectionBy.js
new file mode 100644
index 0000000000..2c9e0d3307
--- /dev/null
+++ b/tools/eslint/node_modules/lodash/intersectionBy.js
@@ -0,0 +1,42 @@
+var arrayMap = require('./_arrayMap'),
+    baseIntersection = require('./_baseIntersection'),
+    baseIteratee = require('./_baseIteratee'),
+    last = require('./last'),
+    rest = require('./rest'),
+    toArrayLikeObject = require('./_toArrayLikeObject');
+
+/**
+ * This method is like `_.intersection` except that it accepts `iteratee`
+ * which is invoked for each element of each `arrays` to generate the criterion
+ * by which uniqueness is computed. The iteratee is invoked with one argument: (value).
+ *
+ * @static
+ * @memberOf _
+ * @category Array
+ * @param {...Array} [arrays] The arrays to inspect.
+ * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
+ * @returns {Array} Returns the new array of shared values.
+ * @example
+ *
+ * _.intersectionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
+ * // => [2.1]
+ *
+ * // The `_.property` iteratee shorthand.
+ * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+ * // => [{ 'x': 1 }]
+ */
+var intersectionBy = rest(function(arrays) {
+  var iteratee = last(arrays),
+      mapped = arrayMap(arrays, toArrayLikeObject);
+
+  if (iteratee === last(mapped)) {
+    iteratee = undefined;
+  } else {
+    mapped.pop();
+  }
+  return (mapped.length && mapped[0] === arrays[0])
+    ? baseIntersection(mapped, baseIteratee(iteratee))
+    : [];
+});
+
+module.exports = intersectionBy;