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+var baseIndexOf = require('../internal/baseIndexOf'),
+ getLength = require('../internal/getLength'),
+ isArray = require('../lang/isArray'),
+ isIterateeCall = require('../internal/isIterateeCall'),
+ isLength = require('../internal/isLength'),
+ isString = require('../lang/isString'),
+ values = require('../object/values');
+
+/* Native method references for those with the same name as other `lodash` methods. */
+var nativeMax = Math.max;
+
+/**
+ * Checks if `target` is in `collection` using
+ * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
+ * for equality comparisons. If `fromIndex` is negative, it's used as the offset
+ * from the end of `collection`.
+ *
+ * @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.
+ * @param- {Object} [guard] Enables use as a callback for functions like `_.reduce`.
+ * @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, guard) {
+ var length = collection ? getLength(collection) : 0;
+ if (!isLength(length)) {
+ collection = values(collection);
+ length = collection.length;
+ }
+ if (typeof fromIndex != 'number' || (guard && isIterateeCall(target, fromIndex, guard))) {
+ fromIndex = 0;
+ } else {
+ fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : (fromIndex || 0);
+ }
+ return (typeof collection == 'string' || !isArray(collection) && isString(collection))
+ ? (fromIndex <= length && collection.indexOf(target, fromIndex) > -1)
+ : (!!length && baseIndexOf(collection, target, fromIndex) > -1);
+}
+
+module.exports = includes;