--- /dev/null
+var Map = require('./_Map'),
+ assocSet = require('./_assocSet'),
+ hashSet = require('./_hashSet'),
+ isKeyable = require('./_isKeyable');
+
+/**
+ * Sets the map `key` to `value`.
+ *
+ * @private
+ * @name set
+ * @memberOf MapCache
+ * @param {string} key The key of the value to set.
+ * @param {*} value The value to set.
+ * @returns {Object} Returns the map cache object.
+ */
+function mapSet(key, value) {
+ var data = this.__data__;
+ if (isKeyable(key)) {
+ hashSet(typeof key == 'string' ? data.string : data.hash, key, value);
+ } else if (Map) {
+ data.map.set(key, value);
+ } else {
+ assocSet(data.map, key, value);
+ }
+ return this;
+}
+
+module.exports = mapSet;