Bump to v3.0.0.

collection/includes.js

@@ -0,0 +1,61 @@
+import baseIndexOf from '../internal/baseIndexOf';
+import isArray from '../lang/isArray';
+import isLength from '../internal/isLength';
+import isString from '../lang/isString';
+import values from '../object/values';
+
+/* Native method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/**
+ * Checks if `value` is in `collection` using `SameValueZero` for equality
+ * comparisons. If `fromIndex` is negative, it is used as the offset from
+ * the end of `collection`.
+ *
+ * **Note:** `SameValueZero` comparisons are like strict equality comparisons,
+ * e.g. `===`, except that `NaN` matches `NaN`. See the
+ * [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
+ * for more details.
+ *
+ * @static
+ * @memberOf _
+ * @alias contains, include
+ * @category Collection
+ * @param {Array|Object|string} collection The collection to search.
+ * @param {*} target The value to search for.
+ * @param {number} [fromIndex=0] The index to search from.
+ * @returns {boolean} Returns `true` if a matching element is found, else `false`.
+ * @example
+ *
+ * _.includes([1, 2, 3], 1);
+ * // => true
+ *
+ * _.includes([1, 2, 3], 1, 2);
+ * // => false
+ *
+ * _.includes({ 'user': 'fred', 'age': 40 }, 'fred');
+ * // => true
+ *
+ * _.includes('pebbles', 'eb');
+ * // => true
+ */
+function includes(collection, target, fromIndex) {
+  var length = collection ? collection.length : 0;
+  if (!isLength(length)) {
+    collection = values(collection);
+    length = collection.length;
+  }
+  if (!length) {
+    return false;
+  }
+  if (typeof fromIndex == 'number') {
+    fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : (fromIndex || 0);
+  } else {
+    fromIndex = 0;
+  }
+  return (typeof collection == 'string' || !isArray(collection) && isString(collection))
+    ? (fromIndex < length && collection.indexOf(target, fromIndex) > -1)
+    : (baseIndexOf(collection, target, fromIndex) > -1);
+}
+
+export default includes;